CVE-2021-1732
Published: November 3, 2021
Official Description
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
CISA KEV Advisory
Microsoft Win32k Privilege Escalation Vulnerability
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
Apply updates per vendor instructions.
Risk Analysis
This unspecified vulnerability in Microsoft Win32k allows for privilege escalation. Its high EPSS score of 0.90423 indicates a very high likelihood of exploitation, making it an urgent concern. The fact that it is in CISA's KEV catalog confirms it has been actively exploited.
This vulnerability is being actively exploited in the wild and is listed in CISA's KEV catalog, indicating confirmed real-world exploitation. This is a local privilege escalation vulnerability.
Apply the latest security updates and patches for Microsoft Windows to address this privilege escalation vulnerability in Win32k. Ensure all Windows systems are kept up-to-date.
Technical Analysis
CVE-2021-1732 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-2021-1732 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-2021-1732 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