OS Command Injection in WS_FTP - CVE-2026-90865
Published: October 29, 2026
Vulnerability identifier: #VU158500
CSH Severity: Medium
CVSS v4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90865
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary operating-system commands.
The vulnerability exists due to improper neutralization of operating-system command elements and argument delimiters in the FTP notification functionality of Progress WS_FTP Server when incorporating notification variables into commands. A remote user can supply crafted values for FTP notification variables under specific configuration conditions to execute arbitrary operating-system commands.
Affected software
WS_FTP
How to mitigate CVE-2026-90865
Install security update from vendor's website.
WS_FTP - addressed in versions 9.0.7, 10.0.4