CVE-2021-36955: Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation Vulnerability
Description
CVE-2021-36955 is a privilege escalation vulnerability in the Microsoft Windows Common Log File System (CLFS) driver. It allows an attacker to gain elevated privileges on affected Windows systems. The vulnerability has been exploited in the wild and is known to have been used in ransomware campaigns. No specific affected versions or patch information is provided in the available data.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Microsoft Windows Common Log File System (CLFS) driver contains an unspecified vulnerability that enables privilege escalation. This vulnerability, tracked as CVE-2021-36955, has been actively exploited in the wild and leveraged in ransomware attacks. The exact technical details and affected Windows versions are not specified in the provided information.
Potential Impact
Successful exploitation of this vulnerability allows attackers to escalate privileges on a Windows system, potentially enabling them to execute code with higher privileges, compromise system integrity, or facilitate further attacks such as ransomware deployment. The presence of known in-the-wild exploitation and ransomware use indicates a significant risk to affected systems.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until official fixes or mitigations are confirmed, organizations should monitor vendor communications and apply any recommended updates promptly once available.
Threat ID: 6adc6f613fe894698b2dda27
Added to database: 10/24/2026, 08:42:09 UTC
Last enriched: 10/24/2026, 09:10:26 UTC
Last updated: 10/24/2026, 09:27:23 UTC
Views: 3
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