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Vulnerabilities

Vulnerability · CVE-2024-55956

Cleo Multiple Products Unauthenticated File Upload Vulnerability

Published Dec 10, 2024 · catalog updated Aug 4, 2026 · Cleo Multiple Products

Patch now

CVE-2024-55956 is in the CISA known-exploited catalog, due Jan 7, 2025. Confirm Cleo Multiple Products against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
93.97%
Remediation
Remediation guidance
Affected products
cpe cleo/harmony · cpe cleo/lexicom · cpe cleo/vltrader · vendor Cleo Multiple Products

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe cleo/harmonyversion unspecified
  • cpe cleo/lexicomversion unspecified
  • cpe cleo/vltraderversion unspecified
  • vendor Cleo Multiple Productsversion unspecified

How to fix CVE-2024-55956

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2024-55956 is in the CISA known-exploited catalog, due Jan 7, 2025. Confirm Cleo Multiple Products against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-276: Incorrect Default Permissions; CWE-77: Command Injection. EPSS 93.97%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 13, 2024 · Catalog

    Detected

    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.

  2. Dec 17, 2024 · CISA KEV

    Known exploited

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

  3. Jan 7, 2025 · CISA KEV

    Remediation due

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

  4. Aug 4, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2024-55956

    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.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2024-55956

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2024-55956

    30-day exploitation probability 94.0%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_multi/http/cleo_rce_cve_2024_55956

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2024-55956

    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 setti

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.