CVE-2024-55956In 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 leve…
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It affects cleo harmony and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Dec 17, 2024; federal agencies had to remediate by Jan 7, 2025, and it is known to be used in ransomware. Treat that date as your deadline.
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Free account, 1 product
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
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-77
- Known exploited
- Added to CISA KEV Dec 17, 2024; federal remediation due Jan 7, 2025; known ransomware useApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 93.97% (percentile 100)
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
cleo harmony cleo:harmony | before 5.8.0.24 | NVD |
cleo lexicom cleo:lexicom | before 5.8.0.24 | NVD |
cleo vltrader cleo:vltrader | before 5.8.0.24 | NVD |
References
- https://support.cleo.com/hc/en-us/articles/28408134019735-Cleo-Product-Security-Advisory-CVE-Pendingvendor-advisory
- https://support.cleo.com/hc/en-us/articles/28408134019735-Cleo-Product-Security-Updatevendor-advisory
- https://www.huntress.com/blog/threat-advisory-oh-no-cleo-cleo-software-actively-being-exploited-in-the-wildexploit, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-55956us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.