CVE-2025-1976
Broadcom Brocade Fabric OS Code Injection Vulnerability
Broadcom Brocade Fabric OS
Brocade Fabric OS versions starting with 9.1.0 have root access removed, however, a local user with admin privilege can potentially execute arbitrary code with full root privileges on Fabric OS versions 9.1.0 through 9.1.1d6.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 28 April 2025. US federal agencies were required to remediate it by 19 May 2025.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 0.7%, which is higher than 53% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2025-1976 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2025-1976.
What does CVE-2025-1976 affect?
CVE-2025-1976 affects Broadcom Brocade Fabric OS. Brocade Fabric OS versions starting with 9.1.0 have root access removed, however, a local user with admin privilege can potentially execute arbitrary code with full root privileges on Fabric OS versions 9.1.0 through 9.1.1d6.
How severe is CVE-2025-1976?
CVE-2025-1976 is rated MEDIUM with a CVSS base score of 6.7. EPSS puts the probability of exploitation in the next 30 days at 0.7%, higher than 53% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 19 May 2025.
How should organisations respond to CVE-2025-1976?
Apply the vendor patch for Broadcom Brocade Fabric OS as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.