Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 77.8%; technical severity is CVSS 7.8.
Windows Win32k Elevation of Privilege Vulnerability
Who should care
- Teams operating Win32k, Windows 10 1803, Windows 10 1809 +7 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Win32k, Windows 10 1803, Windows 10 1809 +7 more is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Apply updates per vendor instructions.
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Vendor remediation
Patch and remediation links
Use the vendor source below to confirm the correct fixed version, package or mitigation for your affected product.
Technical details
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-787
- Affected versions
- Microsoft Win32k; Microsoft Windows 10 1803 (Version: -); Microsoft Windows 10 1809 (Version: -); Microsoft Windows 10 1909 (Version: -); Microsoft Windows 10 2004 (Version: -); Microsoft Windows 10 20h2 (Version: -); Microsoft Windows Server 1909 (Version: -); Microsoft Windows Server 2004 (Version: -)
- Published
- 25 February 2021
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 77.8%
- Signal calculated at 83