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
10 Nov 2026 Microsoft Office Security flaw
Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.
- What to do
- Apply the vendor's update or fix (see the vendor advisory below). If you can't, take it off the internet or stop using it until you can.
- CISA due date
- 24 Nov 2026 (still open)
- Weakness
- CWE-356
27 Oct 2026 Google Brotli Memory corruption
A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream. Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.
- What to do
- Apply the vendor's update or fix (see the vendor advisory below). If you can't, take it off the internet or stop using it until you can.
- Fixed in (NVD)
- nodejs node.js 26.12.1, nodejs node.js 24.22.1, nodejs node.js 22.23.4, microsoft .net 10.0.14, microsoft .net 9.0.22 and 7 older
- CISA due date
- 10 Nov 2026
- Weakness
- CWE-252, CWE-787
13 Oct 2026 Microsoft Windows Command injection
Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
- What to do
- Apply the vendor's update or fix (see the vendor advisory below). If you can't, take it off the internet or stop using it until you can.
- Fixed in (NVD)
- microsoft windows server 2022 10.0.20348.5761, microsoft windows server 2019 10.0.17763.9376, microsoft windows server 2016 10.0.14393.9612, microsoft windows 11 26h2 10.0.26300.9711, microsoft windows 11 26h1 10.0.28000.3231 and 7 older
- CISA due date
- 16 Oct 2026
- Weakness
- CWE-77
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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.