Broadcom Brocade Fabric OS Code Injection (CVE-2025-1976)

Historical catalog analysis: CISA added this entry on April 28, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2025-1976 is a code injection vulnerability (CWE-94) identified in Broadcom Brocade Fabric OS. The flaw allows a local user who already possesses administrative privileges to execute arbitrary code with full root-level permissions on the system.

Exposure and applicability

This vulnerability affects environments utilizing Broadcom Brocade Fabric OS. The exposure path is limited to local users; an attacker must first obtain administrative credentials or access to an account with administrative rights to exploit the flaw for privilege escalation. Because CISA has added this entry to the Known Exploited Vulnerabilities (KEV) catalog as of April 28, 2025, the vulnerability is confirmed to be exploited in the wild, increasing the urgency for infrastructure owners to identify affected assets.

Remediation priorities

Our analysis suggests prioritizing remediation based on the following hierarchy:

1. Immediate Patching: Organizations should apply the mitigations provided by Broadcom via their official security advisory. Given the KEV status, this is the primary method for reducing exposure.
2. Access Review: Because the exploit requires local administrative privileges, defenders should audit all accounts with administrative access to Brocade Fabric OS to ensure the principle of least privilege is enforced, potentially limiting the pool of users capable of triggering the injection.
3. Cloud Service Coordination: For organizations utilizing these services via cloud providers, remediation should follow BOD 22-01 guidance to coordinate patching with the service provider.

How to validate remediation

To verify that exposure has been reduced, vulnerability management teams should move beyond simple version checks. While confirming a patched version is installed is a necessary first step, validation should include:

• Vendor-Specified Verification: Following the specific validation steps outlined in the Broadcom security advisory to ensure the fix is active.
• Configuration Audit: Verifying that administrative access is restricted to authorized personnel only, reducing the likelihood of an unauthorized local user attempting privilege escalation.

Limits and open questions

It remains unknown whether this vulnerability has been utilized by known ransomware campaigns. Additionally, while patching addresses the code injection path, it does not mitigate the risk of initial credential compromise; if administrative credentials are stolen, the attacker still possesses the prerequisite access needed to attempt further exploitation unless the patch is successfully applied. Residual risk persists if legacy systems cannot be updated or if administrative accounts remain over-provisioned.

Source and editorial note

CVE-2025-1976: Broadcom Brocade Fabric OS Code Injection Vulnerability · Source date: April 28, 2025 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: May 01, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: October 17, 2026 at 00:09 UTC.

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