Microsoft has issued a warning regarding a zero-day vulnerability in the Windows Common Log File System (CLFS), identified as CVE-2025-29824, which is currently being exploited in the wild to deploy ransomware. This threat primarily affects industries such as IT, finance, and retail, with attacks reported from the US, Spain, Venezuela, and Saudi Arabia.
The vulnerability, rated "important," allows attackers with standard user access to escalate their privileges, enabling them to execute ransomware attacks across environments. This exploitation has been linked to the threat actor group Storm-2460, which is associated with the RansomEXX group, known for targeting high-profile organizations since 2018.
Microsoft released security updates on April 8 to address the vulnerability in Windows 11 and Windows Server environments, while Windows 10 updates are pending. However, devices running Windows 11 version 24H2 or newer are not vulnerable to this particular exploit.
To execute their attacks, perpetrators employed the certutil command-line utility to download a malicious MSBuild file containing an encrypted PipeMagic payload. Following decryption, the malware grants attackers remote control over affected systems, allowing them to escalate privileges and launch ransomware operations.
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This situation highlights the ongoing risk of privilege escalation vulnerabilities in software systems and the necessity of timely security updates.
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