Last Modified: Aug 26, 2026
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
17.1.3.2, 17.1.3.4, 17.5.1.6, 17.5.1.8, 21.0.0.2, 21.0.0.3, 21.1.0, 21.1.0.1
Opened: May 27, 2026 Severity: 3-Major Related Article:
K000161535
After logging in to the BIG-IP Configuration Utility, some pages display the error "Error getting auth token from login provider." Affected pages include Device Management, Shared Objects, and iApps Application Services
Remote users with usernames that begin with an underscore, or that contain a backslash or at sign, cannot access some Configuration Utility pages. Other pages and CLI access are unaffected.
- BIG-IP is configured to use a remote authentication provider (such as Active Directory, LDAP, or RADIUS) - The remote user's username begins with an underscore, or contains a backslash or an at sign character (for example, _username, DOMAIN\username, or user@domain)
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