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

What is CVE-2021-27795?

CVE-2021-27795 is a medium-severity vulnerability in Broadcom Fabric Operating System, published on 6 Dec 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-327

Which versions are affected by CVE-2021-27795?

It affects 1 product.

Products include Broadcom Fabric Operating System.

How do I fix CVE-2021-27795?

No fix has been published for CVE-2021-27795 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-27795 being exploited?

There is no known exploitation of CVE-2021-27795 in the wild and no public exploit code.

Other vulnerabilities in Broadcom Fabric Operating System

• CVE-2025-1976 Broadcom Brocade Fabric OS Code Injection Exploited High 8.6
• CVE-2021-22555 Linux Kernel Heap Out-of-Bounds Write Exploited High 8.3
• CVE-2022-33186 Command injection in Brocade Fabric OS Critical 9.8
• CVE-2021-27797 Hardcoded credentials in Brocade Fabric OS Critical 9.8
• CVE-2020-15371 Code injection in Brocade Fabric OS Critical 9.8

All Broadcom Fabric Operating System vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-phm5-rgh2-qxcf.