What’s Vulnerable › Vulnerabilities

CVE-2021-27790

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% 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-787

Description

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

• Brocade Fabric OS: before 7.4.2h; from 8.0.0 before 8.2.0_cbn4; from 8.2.1 before 8.2.3; from 9.0.0 before 9.0.1a — fixed in 7.4.2h, 8.2.0_cbn4, 8.2.3, 9.0.1a

How to fix

Upgrade to a fixed version: Brocade Fabric OS 7.4.2h, 8.2.0_cbn4, 8.2.3, 9.0.1a. Check the vendor advisory for mitigations.

References

• https://security.netapp.com/advisory/ntap-20210819-0002/
• https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1492
• https://security.netapp.com/advisory/ntap-20210819-0002/
• https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1492

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