Cleo Multiple Products Unauthenticated File Upload Vulnerability (CVE-2024-55956)
Severity: critical · Patch status: unknown · Since 2024-12-17 · CVE-2024-55956
Cleo Harmony, VLTrader, and LexiCom, which are managed file transfer products, contain an unrestricted file upload vulnerability that could allow an unauthenticated user to import and execute arbitrary bash or PowerShell commands on the host system by leveraging the default settings of the Autorun directory. CISA added CVE-2024-55956 to its Known Exploited Vulnerabilities catalog on Dec 17, 2024, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Jan 7, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
