November 3, 2021 · Applied Cybernetics Group
CVE-2021-31956 — Microsoft Windows
Microsoft Windows NTFS Privilege Escalation Vulnerability
- Added to KEV
2021-11-03- Federal due date
2021-11-17- Vendor
- Microsoft
- Product
- Windows
- EPSS
- 99.5th percentile (score 0.887, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-31956
CISA short description
Microsoft Windows New Technology File System (NTFS) contains an unspecified vulnerability that allows attackers to escalate privileges via a specially crafted application.
Required action
Apply updates per vendor instructions.