CVE-2018-8639
Microsoft Windows 7, Microsoft Windows Server 2012 R2, Microsoft Windows RT 8.1
Published 12 Dec 2018 · updated 17 Jun 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 3 Mar 2025, with a remediation deadline of 24 Mar 2025 for US federal agencies. It has been used in ransomware campaigns.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description
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." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8641.
References
- www.securityfocus.com/bid/106093 · Broken Link, Third Party Advisory, VDB Entry
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8639 · Patch, Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8639 · US Government Resource