IRONSMITHINTEL
CRITICALCVSS9.8
|
Actively Exploited
|CISA KEV|CVE-2024-50623|Auth: none — unauthenticated|Reboot: required|Manual only

Cleo Multiple Products Unrestricted File Upload Vulnerability (CVE-2024-50623)

Cleo Harmony, VLTrader, and LexiCom, which are managed file transfer products, contain an unrestricted file upload and download vulnerability that can lead to remote code execution with elevated privileges.

Published Oct 28, 2024 · Updated May 29, 2026
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Why patchRisk explained in plain English
Worst-case scenarioIf unpatched

A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. CISA has confirmed use of this vulnerability in known ransomware campaigns — treat as high priority for remediation. Federal agencies are required to remediate by 2025-01-03 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Unrestricted File Upload (CWE-434) vulnerability in Cleo Multiple Products. In Cleo Harmony before 5.8.0.21, VLTrader before 5.8.0.21, and LexiCom before 5.8.0.21, there is an unrestricted file upload and download that could lead to remote code execution. Exploitation requires remote network access, low attack complexity, no authentication required, and no user interaction required.

📧

Phishing link

→

🖼

Malicious file

🔓

Server compromised

Am I affected?Quick check

Probably yes if any of these apply:

●IT Security
●Running harmony: v < 5.8.0.21; lexicom: v < 5.8.0.21; vltrader: v < 5.8.0.21
Real-world incidentsWhat we've seen

CISA confirms this CVE has been used in known ransomware campaigns. Added to the KEV catalog on 2024-12-13; federal agencies required to remediate by 2025-01-03.

How to patch

Manual remediation steps

Apply the Vendor Patch

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.

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

References

    1
    Vendor advisory: https://support.cleo.com/hc/en-us/articles/28408134019735-Cleo-Product-Security-Update
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2024-50623
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-50623
PowerShell automationComing soon

No tested PowerShell script for this entry yet. We’re prioritising automation based on user demand.

References

↗ CVE-2024-50623↗ Advisory

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