Last Modified: Jul 28, 2026
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
21.0.0, 21.0.0.1, 21.1.0, 21.1.0.1
Fixed In:
21.0.0.2
Opened: Jan 12, 2026 Severity: 2-Critical
Repeated restarts of the MCPD service in a high availability setup occur when a modified object is deleted within the same transaction
Restart of the MCPD service indicates that the data path is disrupted due to a TMM restart, which was triggered by the MCPD crash
When a modified object is deleted, it causes the MCPD service to restart due to a software issue
There is no alternative except to update to a software version that includes the fix
Do not modify the deleted object within the same transaction