November 3, 2021 · Applied Cybernetics Group
CVE-2021-1732 — Microsoft Win32k
known ransomware use
Microsoft Win32k Privilege Escalation Vulnerability
- Added to KEV
2021-11-03- Federal due date
2021-11-17- Vendor
- Microsoft
- Product
- Win32k
- EPSS
- 99.6th percentile (score 0.784, as of
2026-09-16) - NVD CVSS v3.1
- 7.8 (HIGH)
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-1732
CISA short description
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
Required action
Apply updates per vendor instructions.
NVD description
Windows Win32k Elevation of Privilege Vulnerability