Last Modified: Sep 10, 2026
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
17.1.3.4, 17.5.1.8, 21.0.0.3, 21.1.0.1
Fixed In:
21.1.0.2, 17.5.1.9, 17.1.3.5
Opened: Aug 05, 2026 Severity: 3-Major
SSL handshake failures are logged between the peer address and an internal TMM address, and peer certificate verification errors referring to a self-signed certificate appear in the logs. The connection to the CMI peer is subsequently removed
Configuration synchronization between high availability peers fails, causing the peer connection to drop. As a result, configuration changes are not synchronized, and device group membership may seem disconnected until the issue is resolved
BIG-IP systems in a high availability configuration where ConfigSync is configured to use the management IP address on both devices (the database variable 'configsync.allowmanagement', that allows ConfigSync over the management address is enabled)
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