March 15, 2022 · Applied Cybernetics Group
CVE-2015-2546 Microsoft Win32k
known ransomware use
Microsoft Win32k Memory Corruption Vulnerability
- Added to KEV
2022-03-15- Federal due date
2022-04-05- Vendor
- Microsoft
- Product
- Win32k
- EPSS
- 95.7th percentile (score 0.101, as of
2026-11-06) - NVD CVSS v3.1
- 8.2 (HIGH)
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2015-2546
CISA short description
The kernel-mode driver in Microsoft Windows OS and Server allows local users to gain privileges via a crafted application.
Required action
Apply updates per vendor instructions.
NVD description
The kernel-mode driver in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, and Windows 10 allows local users to gain privileges via a crafted application, aka "Win32k Memory Corruption Elevation of Privilege Vulnerability," a different vulnerability than CVE-2015-2511, CVE-2015-2517, and CVE-2015-2518.