CVE-2015-2546
Published: March 15, 2022
Official Description
The kernel-mode driver in Microsoft Windows OS and Server allows local users to gain privileges via a crafted application.
CISA KEV Advisory
Microsoft Win32k Memory Corruption Vulnerability
The kernel-mode driver in Microsoft Windows OS and Server allows local users to gain privileges via a crafted application.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in the kernel-mode driver of Microsoft Windows OS and Server allows a local user to gain elevated privileges through a specially crafted application. The high EPSS score and confirmed exploitation by CISA indicate that this is a critical local privilege escalation vulnerability.
This vulnerability has been actively exploited in the wild. Exploitation requires a local user to run a malicious application on the affected system.
Apply the latest security updates and patches for Microsoft Windows OS and Server. Implement strong user access controls and ensure that users operate with the principle of least privilege.
Technical Analysis
CVE-2015-2546 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2015-2546 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2015-2546 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1