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CVE-2024-55956: Cleo Multiple Products Unauthenticated File Upload Vulnerability

criticalknown exploitedpublic exploitCVE-2024-55956
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Cleoproduct: Harmony, VLTrader, LexiComRemote code execution
What
The vulnerability allows an unauthenticated user to import and execute arbitrary bash or PowerShell commands on the host system.
Who is affected
Users of Cleo Harmony, VLTrader, and LexiCom products are affected.
Urgency
Immediate remediation is necessary as the vulnerability is actively exploited and classified as critical.
Action
Apply the latest security patches provided by Cleo.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2024-12-17
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-55956

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2024-55956coverage & exploitation statusNVD · CVE.org

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