Last Modified: Oct 19, 2025
Affected Product(s):
BIG-IP APM, Install/Upgrade
Known Affected Versions:
15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 15.1.10.6, 15.1.10.7, 15.1.10.8, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4
Fixed In:
17.5.0, 17.1.2, 16.1.5
Opened: Sep 09, 2023 Severity: 3-Major
401 Unauthorised received from backend server even if SSO succeeds.
Users unable to do SSO or basic auth using credentials.
-- Kerberos SSO configured on 15.1.9
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