Overview
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.
https://support.cleo.com/hc/en-us/articles/28408134019735-Cleo-Product-Security-Update-CVE-2024-55956 ; https://nvd.nist.gov/vuln/detail/CVE-2024-55956
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2024-55956 |
| Vendor / Product | Cleo — Multiple Products |
| NVD Published | 2024-12-13 |
| NVD Last Modified | 2025-11-04 |
| CVSS 3.1 Score | 9.8 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Severity | CRITICAL |
| CWE | CWE-77 |
| CISA KEV Added | 2024-12-17 |
| CISA KEV Deadline | 2025-01-07 |
| Known Ransomware Use | ⚠️ Yes |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2025-01-07.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Timeline
| Date | Event |
|---|---|
| 2024-12-17 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2025-01-07 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2024-55956 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |