CVE-2023-29336
Published: May 9, 2023
Official Description
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation up to SYSTEM privileges.
CISA KEV Advisory
Microsoft Win32K Privilege Escalation Vulnerability
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation up to SYSTEM privileges.
Apply updates per vendor instructions.
Risk Analysis
Microsoft Win32k has an unspecified vulnerability that allows for privilege escalation up to SYSTEM privileges. This is a critical flaw as it grants attackers full control over the system. The high EPSS score of 0.79462 indicates a high likelihood of exploitation, and its inclusion in CISA's KEV confirms active exploitation.
Active exploitation of this vulnerability has been observed in the wild, as confirmed by its presence in CISA's KEV. This vulnerability is likely exploitable locally.
Ensure all Windows systems are fully patched with the latest security updates from Microsoft. Implement the principle of least privilege to limit the impact of successful exploitation.
Technical Analysis
CVE-2023-29336 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-2023-29336 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 (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-29336 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