CVE-2023-40044 KEV
10.0
CRITICAL · CVSS 3.1 · EPSS 90.2% (pctl 100)
Patch first
On CISA KEV — known exploited in the wild, due 2023-10-26.
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.
Scoring
| CVSS | 10.0 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 90.15% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-502 |
| On CISA KEV | yes — remediate by 2023-10-26 |
| Public exploit | none known |
| Published | 2023-09-27 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Progress WS_FTP Server Deserialization of Untrusted Data Vulnerability |
|---|---|
| Added | 2023-10-05 |
| Due | 2023-10-26 |
| Vendor / product | Progress / WS_FTP Server |
| Ransomware use | known |
Affected (1)
| Vendor | Product |
|---|---|
| progress | ws ftp server |
References
- http://packetstormsecurity.com/files/174917/Progress-Software-WS_FTP-Unauthenticated-Remote-Code-Execution.html
- https://attackerkb.com/topics/bn32f9sNax/cve-2023-40044
- https://censys.com/cve-2023-40044/
- https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023
- https://www.assetnote.io/resources/research/rce-in-progress-ws-ftp-ad-hoc-via-iis-http-modules-cve-2023-40044
- https://www.progress.com/ws_ftp
- https://www.rapid7.com/blog/post/2023/09/29/etr-critical-vulnerabilities-in-ws_ftp-server/
- https://www.theregister.com/2023/10/02/ws_ftp_update/
- http://packetstormsecurity.com/files/174917/Progress-Software-WS_FTP-Unauthenticated-Remote-Code-Execution.html
- https://attackerkb.com/topics/bn32f9sNax/cve-2023-40044
- https://censys.com/cve-2023-40044/
- https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023
- https://www.assetnote.io/resources/research/rce-in-progress-ws-ftp-ad-hoc-via-iis-http-modules-cve-2023-40044
- https://www.progress.com/ws_ftp
- https://www.rapid7.com/blog/post/2023/09/29/etr-critical-vulnerabilities-in-ws_ftp-server/
- https://www.theregister.com/2023/10/02/ws_ftp_update/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-40044
→ the Explorer · watch your stack · NVD