CISA Warns of Windows Privilege Escalation Vulnerability Exploited in Attacks - Cybernoz - Cybersecurity News

CISA Warns of Active Exploits in Critical Windows Flaw

The US Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent warning about active exploitation of a critical Microsoft Windows vulnerability that allows attackers to elevate privileges to SYSTEM level.  The flaw, tracked as CVE-2021-43226, affects the Common Log File System (CLFS) driver, a core component of Windows responsible for managing system and application log files. The CISA alert stated that the vulnerability “… c…

CISA Warns of Windows Privilege Escalation Vulnerability Exploited in Attacks - Cybernoz - Cybersecurity News

CISA has issued an urgent security advisory, adding Microsoft Windows privilege escalation vulnerability CVE-2021-43226 to its Known Exploited Vulnerabilities (KEV) catalog on October 6, 2025.  The vulnerability affects the Microsoft Windows Common Log File System (CLFS) Driver and poses significant security risks to enterprise environments. The CVE-2021-43226 vulnerability resides within Microsoft’s Common Log File System Driver, a core Windows…