CVE-2021-27795: License forgery in Brocade Fabric OS (FOS) hardware platforms running any version of Brocade Fabric OS software,

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-06 · updated 2026-06-17
Weakness: CWE-327

Description

Brocade Fabric OS (FOS) hardware platforms running any version of Brocade Fabric OS software, which supports the license string format; contain cryptographic issues that could allow for the installation of forged or fraudulent license keys. This would allow attackers or a malicious party to forge a counterfeit license key that the Brocade Fabric OS platform would authenticate and activate as if it were a legitimate license key.

Affected products

Brocade Fabric OS: all versions

References

https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/21289
https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/21289

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