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CISA Known Exploited Vulnerabilities

The CISA KEV Catalogue, Searchable

Every flaw attackers are known to be using: what it is, how bad, and what fixes it.

Flaws on the list
1,779
Added in 30 days
40
Used in ransomware
361
In web & server software
181

Latest addition 10 Nov 2026. Checked 12 Nov 2026, 15:02 UTC. The catalogue in numbers ›

405 flaws matching "Microsoft", newest first · page 7 of 9. Clear

25 Feb 2022 Microsoft Internet Explorer Memory corruption CVE-2017-0222 8.8

A remote code execution vulnerability exists when Internet Explorer improperly accesses objects in memory, aka "Internet Explorer Memory Corruption Vulnerability." This CVE ID is unique from CVE-2017-0226.

What to do
Apply updates per vendor instructions.
CISA due date
25 Aug 2022
Weakness
CWE-119

NVD Record

25 Feb 2022 Microsoft Windows Remote code execution CVE-2014-6352 7.8

Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allow remote attackers to execute arbitrary code via a crafted OLE object, as exploited in the wild in October 2014 with a crafted PowerPoint document.

What to do
Apply updates per vendor instructions.
CISA due date
25 Aug 2022
Weakness
CWE-94

NVD Record

15 Feb 2022 Microsoft Internet Explorer Memory corruption CVE-2019-0752 7.5 Ransomware

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-0739, CVE-2019-0753, CVE-2019-0862.

What to do
Apply updates per vendor instructions.
CISA due date
15 Aug 2022
Weakness
CWE-843

NVD Record

15 Feb 2022 Microsoft Windows Memory corruption CVE-2018-8174 7.5 Ransomware

A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

What to do
Apply updates per vendor instructions.
CISA due date
15 Aug 2022
Weakness
CWE-787

NVD Record

15 Feb 2022 Microsoft Word Memory corruption CVE-2014-1761 7.8

Microsoft Word 2003 SP3, 2007 SP3, 2010 SP1 and SP2, 2013, and 2013 RT; Word Viewer; Office Compatibility Pack SP3; Office for Mac 2011; Word Automation Services on SharePoint Server 2010 SP1 and SP2 and 2013; Office Web Apps 2010 SP1 and SP2; and Office Web Apps Server 2013 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted RTF data, as exploited in the wild in March 2014.

What to do
Apply updates per vendor instructions.
CISA due date
15 Aug 2022
Weakness
CWE-119

NVD Record

15 Feb 2022 Microsoft Graphics Component Remote code execution CVE-2013-3906 7.8

GDI+ in Microsoft Windows Vista SP2 and Server 2008 SP2; Office 2003 SP3, 2007 SP3, and 2010 SP1 and SP2; Office Compatibility Pack SP3; and Lync 2010, 2010 Attendee, 2013, and Basic 2013 allows remote attackers to execute arbitrary code via a crafted TIFF image, as demonstrated by an image in a Word document, and exploited in the wild in October and November 2013.

What to do
Apply updates per vendor instructions.
CISA due date
15 Aug 2022
Weakness
CWE-94

NVD Record

10 Feb 2022 Microsoft Windows Access control flaw CVE-2021-36934 7.8

An elevation of privilege vulnerability exists because of overly permissive Access Control Lists (ACLs) on multiple system files, including the Security Accounts Manager (SAM) database. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. An attacker must have the ability to execute code on a victim system to exploit this vulnerability. After installing this security update, you must manually delete all shadow copies of system files, including the SAM database, to fully mitigate this vulnerabilty. Simply installing this security update will not fully mitigate this vulnerability. See KB5005357- Delete Volume Shadow Copies.

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows 10 2004 10.0.19041.1165, microsoft windows 10 1909 10.0.18363.1734, microsoft windows 10 1809 10.0.17763.2114, microsoft windows 10 21h1 10.0.19043.1165, microsoft windows 10 20h2 10.0.19042.1165
CISA due date
24 Feb 2022
Weakness
CWE-1220

NVD Record

10 Feb 2022 Microsoft SMBv3 Memory corruption CVE-2020-0796 10.0 Ransomware

A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.

What to do
Apply updates per vendor instructions.
CISA due date
10 Aug 2022
Weakness
CWE-119

NVD Record

10 Feb 2022 Microsoft Windows Security flaw CVE-2017-8464 8.8

Windows Shell in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allows local users or remote attackers to execute arbitrary code via a crafted .LNK file, which is not properly handled during icon display in Windows Explorer or any other application that parses the icon of the shortcut. aka "LNK Remote Code Execution Vulnerability."

What to do
Apply updates per vendor instructions.
CISA due date
10 Aug 2022

NVD Record

10 Feb 2022 Microsoft Win32k Memory corruption CVE-2017-0263 7.8

The kernel-mode drivers in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allow local users to gain privileges via a crafted application, aka "Win32k Elevation of Privilege Vulnerability."

What to do
Apply updates per vendor instructions.
CISA due date
10 Aug 2022
Weakness
CWE-416

NVD Record

10 Feb 2022 Microsoft Office Security flaw CVE-2017-0262 7.8

Microsoft Office 2010 SP2, Office 2013 SP1, and Office 2016 allow a remote code execution vulnerability when the software fails to properly handle objects in memory, aka "Office Remote Code Execution Vulnerability". This CVE ID is unique from CVE-2017-0261 and CVE-2017-0281.

What to do
Apply updates per vendor instructions.
CISA due date
10 Aug 2022

NVD Record

10 Feb 2022 Microsoft SMBv1 Input validation flaw CVE-2017-0145 8.8 Ransomware

The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows remote attackers to execute arbitrary code via crafted packets, aka "Windows SMB Remote Code Execution Vulnerability." This vulnerability is different from those described in CVE-2017-0143, CVE-2017-0144, CVE-2017-0146, and CVE-2017-0148.

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
siemens acuson sc2000 firmware 4.0e, siemens syngo sc2000 firmware 4.0e
CISA due date
10 Aug 2022
Weakness
CWE-20

NVD Record

10 Feb 2022 Microsoft SMBv1 Input validation flaw CVE-2017-0144 8.8 Ransomware

The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows remote attackers to execute arbitrary code via crafted packets, aka "Windows SMB Remote Code Execution Vulnerability." This vulnerability is different from those described in CVE-2017-0143, CVE-2017-0145, CVE-2017-0146, and CVE-2017-0148.

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
siemens acuson sc2000 firmware 4.0e, siemens syngo sc2000 firmware 4.0e
CISA due date
10 Aug 2022
Weakness
CWE-20

NVD Record

10 Feb 2022 Microsoft HTTP.sys Remote code execution CVE-2015-1635 9.8

HTTP.sys in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1, and Windows Server 2012 Gold and R2 allows remote attackers to execute arbitrary code via crafted HTTP requests, aka "HTTP.sys Remote Code Execution Vulnerability."

What to do
Apply updates per vendor instructions.
CISA due date
10 Aug 2022
Weakness
CWE-94

NVD Record

4 Feb 2022 Microsoft Win32k Memory corruption CVE-2022-21882 7.8 Ransomware

Win32k Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2022 10.0.20348.469, microsoft windows server 2019 10.0.17763.2452, microsoft windows server 20h2 10.0.19042.1466, microsoft windows 11 21h2 10.0.22000.434, microsoft windows 10 1909 10.0.18363.2037 and 4 older
CISA due date
18 Feb 2022
Weakness
CWE-787

NVD Record

28 Jan 2022 Microsoft Windows Path traversal CVE-2020-0787 7.8 Ransomware

An elevation of privilege vulnerability exists when the Windows Background Intelligent Transfer Service (BITS) improperly handles symbolic links, aka 'Windows Background Intelligent Transfer Service Elevation of Privilege Vulnerability'.

What to do
Apply updates per vendor instructions.
CISA due date
28 Jul 2022
Weakness
CWE-269, CWE-59

NVD Record

28 Jan 2022 Microsoft Internet Explorer Memory corruption CVE-2014-1776 9.8

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014. NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that "VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks."

What to do
Apply updates per vendor instructions.
CISA due date
28 Jul 2022
Weakness
CWE-416

NVD Record

21 Jan 2022 Microsoft Win32k Denial of service CVE-2018-8453 7.8 Ransomware

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

What to do
Apply updates per vendor instructions.
CISA due date
21 Jul 2022
Weakness
CWE-404

NVD Record

18 Jan 2022 Microsoft Exchange Server Authentication bypass CVE-2021-33766 7.3

Microsoft Exchange Server Information Disclosure Vulnerability

What to do
Apply updates per vendor instructions.
CISA due date
1 Feb 2022
Weakness
CWE-287

NVD Record

10 Jan 2022 Microsoft Win32k Security flaw CVE-2019-1458 7.8 Ransomware

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'.

What to do
Apply updates per vendor instructions.
CISA due date
10 Jul 2022

NVD Record

10 Jan 2022 Microsoft WinVerifyTrust function Weak cryptography CVE-2013-3900 5.5

Why is Microsoft republishing a CVE from 2013? We are republishing CVE-2013-3900 in the Security Update Guide to update the Security Updates table and to inform customers that the EnableCertPaddingCheck is available in all currently supported versions of Windows 10 and Windows 11. While the format is different from the original CVE published in 2013, except for clarifications about how to configure the EnableCertPaddingCheck registry value, the information herein remains unchanged from the original text published on December 10, 2013, Microsoft does not plan to enforce the stricter verification behavior as a default functionality on supported releases of Microsoft Windows. This behavior remains available as an opt-in feature via reg key setting, and is available on supported editions of Windows released since December 10, 2013. This includes all currently supported versions of Windows 10 and Windows 11. The supporting code for this reg key was incorporated at the time of release for Windows 10 and Windows 11, so no security update is required; however, the reg key must be set. See the Security Updates table for the list of affected software. Vulnerability Description A remote code execution vulnerability exists in the way that the WinVerifyTrust function handles Windows Authenticode signature verification for portable executable (PE) files. An anonymous attacker could exploit the vulnerability by modifying an existing signed executable file to leverage unverified portions of the file in such a way as to add malicious code to the file without invalidating the signature. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Exploitation of this vulnerability requires that a user or application run or install a specially crafted, signed PE file. An attacker could modify an... See more at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2013-3900

What to do
Apply updates per vendor instructions.
CISA due date
10 Jul 2022
Weakness
CWE-20

NVD Record

15 Dec 2021 Microsoft Windows Security flaw CVE-2021-43890 7.1 Ransomware

We have investigated reports of a spoofing vulnerability in AppX installer that affects Microsoft Windows. Microsoft is aware of attacks that attempt to exploit this vulnerability by using specially crafted packages that include the malware family known as Emotet/Trickbot/Bazaloader. An attacker could craft a malicious attachment to be used in phishing campaigns. The attacker would then have to convince the user to open the specially crafted attachment. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Please see the Security Updates table for the link to the updated app. Alternatively you can download and install the Installer using the links provided in the FAQ section. Please see the Mitigations and Workaround sections for important information about steps you can take to protect your system from this vulnerability. December 27 2023 Update: In recent months, Microsoft Threat Intelligence has seen an increase in activity from threat actors leveraging social engineering and phishing techniques to target Windows OS users and utilizing the ms-appinstaller URI scheme. To address this increase in activity, we have updated the App Installer to disable the ms-appinstaller protocol by default and recommend other potential mitigations.

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft app installer 1.16, microsoft app installer 1.11
CISA due date
29 Dec 2021

NVD Record

17 Nov 2021 Microsoft Exchange Remote code execution CVE-2021-42321 8.8 Ransomware

Microsoft Exchange Server Remote Code Execution Vulnerability

What to do
Apply updates per vendor instructions.
CISA due date
1 Dec 2021
Weakness
CWE-184, CWE-502

NVD Record

17 Nov 2021 Microsoft Office Security flaw CVE-2021-42292 7.8

Microsoft Excel Security Feature Bypass Vulnerability

What to do
Apply updates per vendor instructions.
CISA due date
1 Dec 2021
Weakness
CWE-357

NVD Record

17 Nov 2021 Microsoft Windows Memory corruption CVE-2021-40449 7.8 Ransomware

Win32k Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2022 10.0.20348.288, microsoft windows server 2019 10.0.17763.2237, microsoft windows server 2016 10.0.14393.4704, microsoft windows server 2004 10.0.19041.1288, microsoft windows 11 21h2 10.0.22000.258 and 7 older
CISA due date
1 Dec 2021
Weakness
CWE-416

NVD Record

3 Nov 2021 Microsoft MSHTML Path traversal CVE-2021-40444 8.8 Ransomware

Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents. An attacker could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine. The attacker would then have to convince the user to open the malicious document. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Microsoft Defender Antivirus and Microsoft Defender for Endpoint both provide detection and protections for the known vulnerability. Customers should keep antimalware products up to date. Customers who utilize automatic updates do not need to take additional action. Enterprise customers who manage updates should select the detection build 1.349.22.0 or newer and deploy it across their environments. Microsoft Defender for Endpoint alerts will be displayed as: “Suspicious Cpl File Execution”. Upon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs. Please see the Mitigations and Workaround sections for important information about steps you can take to protect your system from this vulnerability. UPDATE September 14, 2021: Microsoft has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. Please see the FAQ for important information about which updates are applicable to your system.

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2022 10.0.20348.230, microsoft windows server 2019 10.0.17763.2183, microsoft windows server 2016 10.0.14393.4651, microsoft windows server 2004 10.0.19041.1237, microsoft windows server 20h2 10.0.19042.1237 and 7 older
CISA due date
17 Nov 2021
Weakness
CWE-22

NVD Record

3 Nov 2021 Microsoft Open Management Infrastructure (OMI) Security flaw CVE-2021-38649 7.0

Open Management Infrastructure Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft open management infrastructure 1.6.8-1
CISA due date
17 Nov 2021

NVD Record

3 Nov 2021 Microsoft Open Management Infrastructure (OMI) Authentication bypass CVE-2021-38648 7.8

Open Management Infrastructure Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft open management infrastructure 1.6.8-1
CISA due date
17 Nov 2021
Weakness
CWE-1390

NVD Record

3 Nov 2021 Microsoft Open Management Infrastructure (OMI) Authentication bypass CVE-2021-38647 9.8 Ransomware

Open Management Infrastructure (OMI) Remote Code Execution Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft open management infrastructure 1.6.8-1
CISA due date
17 Nov 2021
Weakness
CWE-1390

NVD Record

3 Nov 2021 Microsoft Open Management Infrastructure (OMI) Security flaw CVE-2021-38645 7.8

Open Management Infrastructure Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft open management infrastructure 1.6.8-1
CISA due date
17 Nov 2021

NVD Record

3 Nov 2021 Microsoft Windows Security flaw CVE-2021-36955 7.8 Ransomware

Windows Common Log File System Driver Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2022 10.0.20348.230, microsoft windows server 2019 10.0.17763.2183, microsoft windows server 2016 10.0.14393.4651, microsoft windows server 2004 10.0.19041.1237, microsoft windows server 20h2 10.0.19042.1237 and 7 older
CISA due date
17 Nov 2021

NVD Record

3 Nov 2021 Microsoft Windows Security flaw CVE-2021-36948 7.8

Windows Update Medic Service Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2019 10.0.17763.2114, microsoft windows server 2004 10.0.19041.1165, microsoft windows server 20h2 10.0.19042.1165, microsoft windows 10 2004 10.0.19041.1165, microsoft windows 10 1909 10.0.18363.1734 and 3 older
CISA due date
17 Nov 2021

NVD Record

3 Nov 2021 Microsoft Windows Security flaw CVE-2021-36942 7.5 Ransomware

Windows LSA Spoofing Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2019 10.0.17763.2114, microsoft windows server 2016 10.0.14393.4583, microsoft windows server 2004 10.0.19041.1165, microsoft windows server 20h2 10.0.19042.1165
CISA due date
17 Nov 2021
Weakness
CWE-749

NVD Record

3 Nov 2021 Microsoft Windows Privilege escalation CVE-2021-34527 8.8 Ransomware

A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. UPDATE July 7, 2021: The security update for Windows Server 2012, Windows Server 2016 and Windows 10, Version 1607 have been released. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. In addition to installing the updates, in order to secure your system, you must confirm that the following registry settings are set to 0 (zero) or are not defined (Note: These registry keys do not exist by default, and therefore are already at the secure setting.), also that your Group Policy setting are correct (see FAQ): HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers\PointAndPrint NoWarningNoElevationOnInstall = 0 (DWORD) or not defined (default setting) UpdatePromptSettings = 0 (DWORD) or not defined (default setting) Having NoWarningNoElevationOnInstall set to 1 makes your system vulnerable by design. UPDATE July 6, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. See also KB5005010: Restricting installation of new printer drivers after applying the July 6, 2021 updates. Note that the security updates released on and after July 6, 2021 contain protections for CVE-2021-1675 and the additional remote code execution exploit in the Windows Print Spooler service known as “PrintNightmare”, documented in CVE-2021-34527.

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2022 10.0.20348.230, microsoft windows server 2019 10.0.17763.2029, microsoft windows server 2016 10.0.14393.4470, microsoft windows server 20h2 10.0.19042.1083, microsoft windows 11 22h2 10.0.22621.674 and 7 older
CISA due date
3 May 2022
Weakness
CWE-269

NVD Record

3 Nov 2021 Microsoft Exchange Server Authentication bypass CVE-2021-34523 9.0 Ransomware

Microsoft Exchange Server Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
CISA due date
17 Nov 2021
Weakness
CWE-287

NVD Record

3 Nov 2021 Microsoft Exchange Server Server-side request forgery CVE-2021-34473 9.1 Ransomware

Microsoft Exchange Server Remote Code Execution Vulnerability

What to do
Apply updates per vendor instructions.
CISA due date
17 Nov 2021
Weakness
CWE-918

NVD Record

3 Nov 2021 Microsoft Windows Memory corruption CVE-2021-34448 6.8

Scripting Engine Memory Corruption Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2019 10.0.17763.2061, microsoft windows server 2016 10.0.14393.4530, microsoft windows 10 2004 10.0.19041.1110, microsoft windows 10 1909 10.0.18363.1679, microsoft windows 10 1809 10.0.17763.2061 and 4 older
CISA due date
17 Nov 2021
Weakness
CWE-787

NVD Record

3 Nov 2021 Microsoft Windows Memory corruption CVE-2021-33771 7.8

Windows Kernel Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2019 10.0.17763.2061, microsoft windows server 2016 10.0.14393.4530, microsoft windows server 2004 10.0.19041.1110, microsoft windows server 20h2 10.0.19042.1110, microsoft windows 10 2004 10.0.19041.1110 and 6 older
CISA due date
17 Nov 2021
Weakness
CWE-119

NVD Record

3 Nov 2021 Microsoft Windows Memory corruption CVE-2021-33742 7.5

Windows MSHTML Platform Remote Code Execution Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2019 10.0.17763.1999, microsoft windows server 2016 10.0.14393.4467, microsoft windows 10 2004 10.0.19041.1052, microsoft windows 10 1909 10.0.18363.1621, microsoft windows 10 1809 10.0.17763.1999 and 4 older
CISA due date
17 Nov 2021
Weakness
CWE-787, CWE-823

NVD Record

3 Nov 2021 Microsoft Windows Security flaw CVE-2021-33739 8.4

Microsoft DWM Core Library Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2004 10.0.19041.1052, microsoft windows server 20h2 10.0.19042.1052, microsoft windows 10 2004 10.0.19041.1052, microsoft windows 10 1909 10.0.18363.1621, microsoft windows 10 21h1 10.0.19043.1052 and 1 older
CISA due date
17 Nov 2021

NVD Record

3 Nov 2021 Microsoft Windows Memory corruption CVE-2021-31979 7.8

Windows Kernel Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2019 10.0.17763.2061, microsoft windows server 2016 10.0.14393.4530, microsoft windows server 2004 10.0.19041.1110, microsoft windows server 20h2 10.0.19042.1110, microsoft windows 10 2004 10.0.19041.1110 and 6 older
CISA due date
17 Nov 2021
Weakness
CWE-119

NVD Record

3 Nov 2021 Microsoft Windows Memory corruption CVE-2021-31956 7.8

Windows NTFS Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2019 10.0.17763.1999, microsoft windows server 2016 10.0.14393.4467, microsoft windows server 2004 10.0.19041.1052, microsoft windows server 20h2 10.0.19042.1052, microsoft windows 10 2004 10.0.19041.1052 and 6 older
CISA due date
17 Nov 2021
Weakness
CWE-191, CWE-787

NVD Record

3 Nov 2021 Microsoft Windows Information disclosure CVE-2021-31955 5.5

Windows Kernel Information Disclosure Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2019 10.0.17763.1999, microsoft windows server 2004 10.0.19041.1052, microsoft windows server 20h2 10.0.19042.1052, microsoft windows 10 2004 10.0.19041.1052, microsoft windows 10 1909 10.0.18363.1621 and 3 older
CISA due date
17 Nov 2021
Weakness
CWE-497

NVD Record

3 Nov 2021 Microsoft Exchange Server Malicious file upload CVE-2021-31207 6.6 Ransomware

Microsoft Exchange Server Security Feature Bypass Vulnerability

What to do
Apply updates per vendor instructions.
CISA due date
17 Nov 2021
Weakness
CWE-20, CWE-434

NVD Record

3 Nov 2021 Microsoft Enhanced Cryptographic Provider Security flaw CVE-2021-31201 5.2

Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2019 10.0.17763.1999, microsoft windows server 2016 10.0.14393.4467, microsoft windows server 2004 10.0.19041.1052, microsoft windows server 20h2 10.0.19042.1052, microsoft windows 10 2004 10.0.19041.1052 and 6 older
CISA due date
17 Nov 2021

NVD Record

3 Nov 2021 Microsoft Enhanced Cryptographic Provider Security flaw CVE-2021-31199 5.2

Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
Fixed in (NVD)
microsoft windows server 2019 10.0.17763.1999, microsoft windows server 2016 10.0.14393.4467, microsoft windows server 2004 10.0.19041.1052, microsoft windows server 20h2 10.0.19042.1052, microsoft windows 10 2004 10.0.19041.1052 and 6 older
CISA due date
17 Nov 2021

NVD Record

3 Nov 2021 Microsoft Win32k Memory corruption CVE-2021-28310 7.8

Win32k Elevation of Privilege Vulnerability

What to do
Apply updates per vendor instructions.
CISA due date
17 Nov 2021
Weakness
CWE-787

NVD Record

3 Nov 2021 Microsoft Internet Explorer Security flaw CVE-2021-27085 8.8

Internet Explorer Remote Code Execution Vulnerability

What to do
Apply updates per vendor instructions.
CISA due date
17 Nov 2021

NVD Record

3 Nov 2021 Microsoft Exchange Server Path traversal CVE-2021-27065 7.8 Ransomware

Microsoft Exchange Server Remote Code Execution Vulnerability

What to do
Apply updates per vendor instructions.
CISA due date
3 May 2022
Weakness
CWE-39

NVD Record

3 Nov 2021 Microsoft Office Security flaw CVE-2021-27059 7.6

Microsoft Office Remote Code Execution Vulnerability

What to do
Apply updates per vendor instructions.
CISA due date
17 Nov 2021

NVD Record

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About the KEV Catalogue

What is the CISA KEV catalogue?

CISA's list of flaws attackers are known to be using. A flaw is added only with reliable evidence of attacks and a known fix.

Why does it matter more than the CVSS score?

Few CVEs are ever used in attacks. These are, so fix them first, whatever their score.

What is the due date?

The deadline for US federal agencies to fix it (BOD 26-04, which replaced BOD 22-01): as little as three days for recent entries. A sensible deadline for anyone.

Does it apply outside the US?

The deadlines don't, but the flaws are in software used everywhere. If you run it, it applies to you.

What does "used in ransomware" mean?

CISA knows ransomware groups have used the flaw.

How often is it updated?

CISA adds flaws several times a week. CVE Hawk checks hourly and alerts you within half an hour if it's your software.

Source: CISA Known Exploited Vulnerabilities catalogue. Summaries and scores from the NVD. CVE Hawk is not affiliated with CISA or the NVD.

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