November 3, 2021 · Applied Cybernetics Group
CVE-2021-31955 Microsoft Windows
Microsoft Windows Kernel Information Disclosure Vulnerability
- Added to KEV
2021-11-03- Federal due date
2021-11-17- Vendor
- Microsoft
- Product
- Windows
- EPSS
- 99.6th percentile (score 0.811, as of
2026-11-06) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-31955
CISA short description
Microsoft Windows Kernel contains an unspecified vulnerability that allows for information disclosure. Successful exploitation allows attackers to read the contents of kernel memory from a user-mode process.
Required action
Apply updates per vendor instructions.