Microsoft has released a comprehensive security update addressing 126 vulnerabilities across its systems and key products. Among these, a critical zero-day flaw in the Windows Common Log File System (CLFS) has been actively exploited by the cybercriminal group Storm-2460. This update comes as organizations worldwide face increasing ransomware threats, highlighting the importance of timely software patching.
Recent reports indicate a rise in the exploitation of elevation of privilege vulnerabilities within Microsoft’s CLFS, a trend that Microsoft’s latest patch aims to counter. Compared to previous security updates, this month marks a significant increase in the number of vulnerabilities addressed, reflecting the escalating tactics employed by threat actors to compromise systems.
How Did Storm-2460 Exploit the Zero-Day Vulnerability?
Storm-2460 utilized CVE-2025-29824 to initiate ransomware attacks by deploying PipeMagic malware. The group targeted a diverse range of organizations, including those in the IT and real estate sectors in the United States, the financial sector in Venezuela, a Spanish software company, and the retail sector in Saudi Arabia. This exploitation allowed the attackers to escalate privileges and gain extensive control over affected systems.
What Are the Potential Consequences of the CLFS Vulnerability?
“CVE-2025-29824 is significant because it affects a core component of Windows, impacting a wide range of environments, including enterprise systems and critical infrastructure,”
stated Mike Walters, president and co-founder at Action1. Exploiting this vulnerability enables attackers to install malware, modify system files, disable security features, and access sensitive data, leading to full system compromise and lateral movement within networks.
Why Are CLFS Vulnerabilities Frequently Targeted by Ransomware Operators?
“Elevation of privilege flaws in CLFS have become especially popular among ransomware operators over the years,”
stated Satnam Narang, senior staff research engineer at Tenable. These vulnerabilities allow threat actors to escalate their access levels seamlessly, facilitating the widespread deployment and detonation of ransomware within compromised environments.
Addressing these vulnerabilities is crucial for maintaining the security and integrity of affected systems. Organizations are advised to promptly apply the latest patches and continuously monitor their networks for potential threats. Implementing robust security measures and staying informed about current vulnerabilities can help mitigate the risks posed by such cyberattacks.
