ClosedPatched

Progress WS_FTP Server: Deserialization of Untrusted Data (CVE-2023-40044)

Progress WS_FTP Server

Progress WS_FTP Server contains a deserialization of untrusted data vulnerability in the Ad Hoc Transfer module that allows an authenticated attacker to execute remote commands on the underlying operating system. Added to CISA KEV on 2023-10-05. CISA lists known use in ransomware campaigns.

Why this severity: CVSS 8.8 (NVD), actively exploited (CISA KEV), known ransomware use

Started: Oct 5, 2023
Closed: Oct 5, 2023
CVE: CVE-2023-40044

Follow this incident

Updated Oct 5, 2023

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Oct 5, 2023
CISA added CVE-2023-40044 to the KEV catalog (due 2023-10-26).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).

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