Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 73.9%; technical severity is CVSS 7.8.
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'.
Who should care
- Teams operating Win32k, Windows 10 1507, Windows 10 1607 +6 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Win32k, Windows 10 1507, Windows 10 1607 +6 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
- Not classified
- Affected versions
- Microsoft Win32k; Microsoft Windows 10 1507 (Version: -); Microsoft Windows 10 1607 (Version: -); Microsoft Windows 7 (Version: -); Microsoft Windows 8.1 (Version: -); Microsoft Windows Rt 8.1 (Version: -); Microsoft Windows Server 2008 (Version: r2); Microsoft Windows Server 2012 (Version: r2)
- Published
- 10 December 2019
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 73.9%
- Signal calculated at 83