CVE-2024-55956

CRITICAL CISA KEV
Published Dec 13, 2024 Modified Nov 4, 2025 CWE-77

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 v3.1 Score

9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Dec 17, 2024 Remediation due: Jan 7, 2025 Known ransomware use

Weakness Type (CWE)

CWE-77 CWE-77

Affected Products

Vendor Product
cleo harmony
cleo lexicom
cleo vltrader

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.
How severe is CVE-2024-55956? +
CVE-2024-55956 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.
What products are affected by CVE-2024-55956? +
CVE-2024-55956 affects products from cleo, specifically: harmony, lexicom, vltrader. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-55956? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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