CVE-2021-27793: Broadcom Fabric Operating System

Medium severity, CVSS 5.3. EPSS: 0.9% chance of exploitation in the next 30 days.

ntermittent authorization failure in aaa tacacs+ with Brocade Fabric OS versions before Brocade Fabric OS v9.0.1b and after 9.0.0, also in Brocade Fabric OS before Brocade Fabric OS v8.2.3a and after v8.2.0 could cause a user with a valid account to be unable to log into the switch.

Affected products

• Broadcom Fabric Operating System: from 8.2.0, before 8.2.3 (fixed in 8.2.3); from 9.0.0, before 9.0.1 (fixed in 9.0.1); version 8.2.3 only; version 9.0.1 only; version 9.0.1a only

Published 2021-08-12. Last modified 2026-06-17.