What’s Vulnerable › Vulnerabilities

CVE-2021-27793

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-12 · updated 2026-06-17
• Weakness: CWE-863

Description

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

• Brocade Fabric OS: from 8.2.0 before 8.2.3; from 9.0.0 before 9.0.1; 8.2.3, 9.0.1, 9.0.1a — fixed in 8.2.3, 9.0.1

How to fix

Upgrade to a fixed version: Brocade Fabric OS 8.2.3, 9.0.1. Check the vendor advisory for mitigations.

References

• https://security.netapp.com/advisory/ntap-20210819-0001/
• https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1553
• https://security.netapp.com/advisory/ntap-20210819-0001/
• https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1553

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