Last Modified: Aug 19, 2026
Affected Product(s):
BIG-IP SWG
Known Affected Versions:
11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3
Fixed In:
12.0.0
Opened: Mar 26, 2015 Severity: 3-Major Related Article:
K17137
When accessing HTTPS websites (via SWG) that present a certificate without a CN in the subject, a TMM crash occurs.
Traffic disrupted while tmm restarts.
SWG explicit or transparent proxy using Category Lookup in the per-request access policy with Subject.CN as input. The crash only happens when accessing a site that has no CN in the Certificate's subject - this is not a common condition.
Use Category lookup with SNI as input.
When Category Lookup is configured to use Subject.CN as input, if the certificate subject does not contain a CN, APM processes the error correctly by logging an error.