CVE-2016-7255
Published: November 3, 2021
Official Description
Microsoft Win32k kernel-mode driver fails to properly handle objects in memory which allows for privilege escalation. Successful exploitation allows an attacker to run code in kernel mode.
CISA KEV Advisory
Microsoft Win32k Privilege Escalation Vulnerability
Microsoft Win32k kernel-mode driver fails to properly handle objects in memory which allows for privilege escalation. Successful exploitation allows an attacker to run code in kernel mode.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in the Microsoft Win32k kernel-mode driver involves improper handling of objects in memory, leading to privilege escalation. Successful exploitation allows an attacker to run code in kernel mode. Its high EPSS score of 0.89296 and inclusion in CISA's KEV confirm active exploitation, making it a critical threat for Windows systems.
This vulnerability has been actively exploited in the wild and is included in CISA's KEV, confirming its use in real-world attacks. It is likely exploitable locally to gain kernel-level privileges.
Administrators must apply the latest security updates for Microsoft Windows to address this privilege escalation vulnerability. Ensure all Windows systems are regularly patched to prevent exploitation.
Technical Analysis
CVE-2016-7255 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-2016-7255 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-2016-7255 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