CISA-confirmed known exploited vulnerability

CVE-2024-55956

Cleo Multiple Products Unauthenticated File Upload Vulnerability

Cleo · Multiple Products

Vulnerability details

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.

Added to CISA KEV: 2024-12-17

Ransomware campaign use: Known

CISA due date: 2025-01-07

Defensive guidance from CISA

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

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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