Last Modified: Feb 04, 2026
Affected Product(s):
BIG-IP TMOS
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, 17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3
Fixed In:
21.0.0, 17.5.1.4, 17.1.3.1
Opened: Sep 17, 2025 Severity: 3-Major Related Article:
K000156643
SMTP validation did not follow expected behavior.
NA
NA
NA
SMTP validation follows expected behaviour.