CVE-2023-40044
WS_FTP Server Ad Hoc Transfer Module .NET Deserialization Vulnerability
- Published
- Sep 27, 2023
- Updated
- Oct 21, 2025
- Assigning CNA
- ProgressSoftware
- Evidence observed
- Oct 5, 2023
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.8%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
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.
Sources
modules/exploits/windows/http/ws_ftp_rce_cve_2023_40044.rb
Metasploit Framework modulesDeclared conditions
- platform: Windows($.exploit_windows/http/ws_ftp_rce_cve_2023_40044.platform)
- verification: check_declared($.exploit_windows/http/ws_ftp_rce_cve_2023_40044.check)
http/cves/2023/CVE-2023-40044.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: regex,status($.matchers[*].type)
Responsible use
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