Incorrect Implementation of Authentication Algorithm in WS_FTP - CVE-2026-84296
Published: October 29, 2026
Vulnerability identifier: #VU158495
CSH Severity: Low
CVSS v4: 7.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-84296
CWE-ID: CWE-303
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass multi-factor authentication and potentially gain unauthorized account access.
The vulnerability exists due to an incorrectly implemented authentication algorithm in the SSH service of Progress WS_FTP Server when performing multi-factor authentication. A remote user can exploit the affected authentication flow under specific conditions to bypass multi-factor verification and potentially gain unauthorized account access.
Affected software
WS_FTP
How to mitigate CVE-2026-84296
Install security update from vendor's website.
WS_FTP - addressed in versions 9.0.7, 10.0.4