CVE-2019-0808
Published: November 3, 2021
Official Description
Microsoft Win32k contains a privilege escalation vulnerability due to the component failing to properly handle objects in memory. Successful exploitation allows an attacker to run code in kernel mode.
CISA KEV Advisory
Microsoft Win32k Privilege Escalation Vulnerability
Microsoft Win32k contains a privilege escalation vulnerability due to the component failing to properly handle objects in memory. Successful exploitation allows an attacker to run code in kernel mode.
Apply updates per vendor instructions.
Risk Analysis
This flaw in Microsoft Win32k allows an attacker to escalate privileges and execute code in kernel mode by manipulating how the system manages objects in memory. The high EPSS score of 0.74238 and its inclusion in CISA's KEV highlight the urgency of addressing this actively exploited vulnerability.
This vulnerability is actively being exploited in the wild, confirming its use by attackers. Its presence in CISA's KEV indicates a high likelihood of successful exploitation.
Apply the latest security updates from Microsoft to patch the Win32k component. Ensure all Windows systems are kept up-to-date to prevent privilege escalation.
Technical Analysis
CVE-2019-0808 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-2019-0808 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-2019-0808 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