CVE-2013-3900
Published: January 10, 2022
Official Description
A remote code execution vulnerability exists in the way that the WinVerifyTrust function handles Windows Authenticode signature verification for PE files.
CISA KEV Advisory
Microsoft WinVerifyTrust function Remote Code Execution
A remote code execution vulnerability exists in the way that the WinVerifyTrust function handles Windows Authenticode signature verification for PE files.
Apply updates per vendor instructions.
Risk Analysis
A remote code execution vulnerability exists in the WinVerifyTrust function's handling of Windows Authenticode signature verification for PE files. With an EPSS score of 0.80494 and confirmed exploitation, this flaw can allow attackers to execute arbitrary code on affected systems.
This vulnerability is actively exploited in the wild and is listed in CISA's KEV catalog, confirming its use by attackers. The remote code execution capability makes it a critical threat.
Apply all available security updates from Microsoft to address this vulnerability in the WinVerifyTrust function. Implement robust endpoint protection and ensure systems are configured to only execute trusted applications.
Technical Analysis
CVE-2013-3900 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-2013-3900 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.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2013-3900 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