Last Modified: Aug 31, 2026
Affected Product(s):
BIG-IP All
Known Affected Versions:
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, 17.1.2, 17.1.2.1, 17.1.2.2, 17.1.3, 17.1.3.1, 17.1.3.2, 17.1.3.4, 17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 17.5.1.5, 17.5.1.6, 17.5.1.8, 21.1.0, 21.1.0.1
Opened: Jul 21, 2026 Severity: 3-Major
The BIG-IP Configuration utility occasionally displays "Unable to contact BIG-IP device" when switching between partitions, despite the device being reachable. The pop-up quickly indicates "Device connection has been restored" with an elapsed time of 0 seconds
No impact to traffic processing. The Configuration utility briefly shows a connectivity warning and automatically recovers; no re-authentication is required
- Switching between partitions in the BIG-IP Configuration utility - More likely to occur on systems with multiple partitions and provisioned modules that increase page load time
- The message clears automatically after a few seconds - The user will need to click "Continue" to dismiss the popup
None