CVE-2026-21302: Windows CLFS Privilege Escalation
Is Windows CLFS still being exploited?
An out-of-bounds write vulnerability in the Windows Common Log File System (CLFS) driver. Local attackers can escalate privileges to SYSTEM by exploiting memory corruption in log file parsing, a recurring attack surface in Windows.
Impact & Exploitation
CLFS has been a persistent attack surface with multiple zero-days. Used by ransomware groups for post-exploitation privilege escalation. Affects all supported Windows versions.
Precogs Research
This vulnerability intelligence report was analyzed and enriched by the Precogs AI Security Team. Our researchers continuously monitor emerging threats across AI code, LLM pipelines, and binary architectures to ensure accurate real-time remediation guidance.