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CVE-2023-40044

WS_FTP Server Ad Hoc Transfer Module .NET Deserialization Vulnerability

Published: Sep 27, 2023Updated: Oct 31, 2025 Sources: CVE List NVD BDUCWE-502
NVD MITRE
10.0CVSSCRITICAL
EPSS Score
90.0%
Top 0.2%
CISA KEV
Active Exploitation
Since Oct 5, 2023
Exploits
1 Known
Remediation
Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-502

Affected Products

WS_FTP ServerIpswitch Inc.
On-prem
Networking Infrastructure / network-management
WS_FTP ServerProgress Software Corporation
Mixed
Enterprise Software / itsm-monitoring
ws ftp serverprogress
On-premNetwork Device
Networking Infrastructure / network-management
ipswitch inc.commercialNetworking Infrastructure
progress software corporationcommercialUSEnterprise Softwareaka whatsup gold, moveit transfer, loadmaster
progresscommercialCAEnterprise Softwareaka moveit transfer, ws ftp server, whatsup gold

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Oct 5, 2023
Remediation due:Oct 26, 2023
Ransomware:Known ransomware use

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

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

3 techniques
Execution
Initial Access
View detailed technique mapping

References

http://packetstormsecurity.com/files/174917/Progress-Software-WS_FTP-Unauthenticated-Remote-Code-Execution.html
packetstormsecurity.com
https://attackerkb.com/topics/bn32f9sNax/cve-2023-40044
attackerkb.com
https://censys.com/cve-2023-40044/
censys.com
and 7 more references View all →

Timeline

Published
Sep 27, 2023
Added to CISA KEV
Oct 5, 2023
Last Updated
Oct 31, 2025

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