CVE-2024-55956

CRITICAL9.8

CISA KEV

Published 2024-12-13 · Updated 2026-08-05 · Source cve@mitre.org

Summary

CVE-2024-55956 is a critical-severity (CVSS 9.8) vulnerability in Cleo Multiple Products. CISA added it to the Known Exploited Vulnerabilities catalog on December 17, 2024, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by January 7, 2025. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Cleo has 2 vulnerabilities in the KEV catalog, 2 of them linked to ransomware.

All 2 known-exploited Cleo vulnerabilities →

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.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-77CWE-77

CISA Known-Exploited Vulnerability

Product: Cleo — Multiple Products

Name: Cleo Multiple Products Unauthenticated File Upload Vulnerability

Date added: 2024-12-17 · Due: 2025-01-07

USED IN RANSOMWARE

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

References

View on NVD

More exploited Cleo vulnerabilities

Most recently added to CISA KEV

CVE-2024-50623
RANSOMWARE
Multiple Products — Cleo Multiple Products Unrestricted File Upload Vulnerability
added 2024-12-13

View all →

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