Reference page — cumulative record through Wednesday, October 7, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2023-40044

CVE-2023-40044CRITICAL

Progress Software Corporation WS_FTP Server — WS_FTP Server Ad Hoc Transfer Module .NET Deserialization Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  C  H  H  H   10.0   .9035   99.8   YES

AFFECTED
  Product        Versions  Fixed
  WS_FTP Server  8.8.0 –   —

TIMELINE
  Aug 8   Reserved by ProgressSoftware
  Sep 27  Published (CNA: ProgressSoftware)
  Oct 5   Added to CISA KEV, remediation due 2023-10-26

CWE-502 · CNA: ProgressSoftware · CVSS v3.1 · 9 references · KEV due October 26, 2023

Description

In WS_FTP Server versions prior to 8.7.4 and 8.8.2, a pre-authenticated attacker could leverage a .NET deserialization vulnerability in the Ad Hoc Transfer module to execute remote commands on the underlying WS_FTP Server operating system.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 8, 2023	Reserved	Reserved by ProgressSoftware
September 27, 2023	Published	Published (CNA: ProgressSoftware)
October 5, 2023	KEV ADDED	Added to CISA KEV, remediation due 2023-10-26

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Progress Software Corporation	WS_FTP Server	—	8.8.0	—

Weaknesses

CWE-502

References (9)

Authoritative record: CVE-2023-40044 at cve.org

Vendors: progress

Weaknesses: CWE-502

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-40044 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, October 7, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.