Cleo Multiple Products Unauthenticated File Upload Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2024-12-17
• Known to be used in ransomware campaigns
• EPSS: 94% chance of exploitation in the next 30 days (higher than 100% of CVEs)
• Critical severity: CVSS 9.8

[ Description ]Official description

In Cleo Harmony before 5.8.0.24, VLTrader before 5.8.0.24, and LexiCom before 5.8.0.24, an unauthenticated user can import and execute arbitrary Bash or PowerShell commands on the host system by leveraging the default settings of the Autorun directory.

CISA: 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.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 7 Jan 2025): Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• support.cleo.com/hc/en-us/articles/28408134019735-Cleo-Product-Security-Advisory-CVE-Pe…Vendor Advisory
• support.cleo.com/hc/en-us/articles/28408134019735-Cleo-Product-Security-UpdateVendor Advisory
• www.huntress.com/blog/threat-advisory-oh-no-cleo-cleo-software-actively-being-exploited…ExploitThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource