Cleo Multiple Products Unauthenticated File Upload Vulnerability
n/a — n/a
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.
9.8
94.0%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- Dec 13, 2024
- Modified
- Aug 5, 2026
- Added to KEV
- Dec 17, 2024
- Federal patch due
- Jan 7, 2025
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2024-55956, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit — cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2024-55956 were found at last check. Absence here is not proof no exploit exists — see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2024-55956?
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.
How severe is CVE-2024-55956?
CVE-2024-55956 has a CVSS base score of 9.8 out of 10 (CVSS 3.1).
Is CVE-2024-55956 actively exploited in the wild?
Yes. CVE-2024-55956 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Dec 17, 2024, meaning CISA has confirmed evidence of active exploitation. It is also flagged as used in ransomware campaigns.
What is the EPSS score for CVE-2024-55956?
94.0% - meaning FIRST.org's EPSS model estimates a 94.0% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2024-55956?
Yes - a public Nuclei template referencing CVE-2024-55956 exist in public repositories we checked.
What type of vulnerability is CVE-2024-55956?
CVE-2024-55956 is classified under CWE-77 (CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')).
Cross-checked against
Impactr finds and proves whether CVE-2024-55956 — or flaws like it — are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.