CVE-2021-27790: Broadcom Fabric Operating System

High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days.

The command ipfilter in Brocade Fabric OS before Brocade Fabric OS v.9.0.1a, v8.2.3, and v8.2.0_CBN4, and v7.4.2h uses unsafe string function to process user input. Authenticated attackers can abuse this vulnerability to exploit stack-based buffer overflows, allowing execution of arbitrary code as the root user account.

Affected products

• Broadcom Fabric Operating System: before 7.4.2h (fixed in 7.4.2h); from 8.0.0, before 8.2.0_cbn4 (fixed in 8.2.0_cbn4); from 8.2.1, before 8.2.3 (fixed in 8.2.3); from 9.0.0, before 9.0.1a (fixed in 9.0.1a)

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