Vulnerability in Brocade Fabric OS

[ Description ]Official description

An authentication and access control bypass vulnerability exists in the web server management interface of Brocade Fabric OS versions before 10.0.1. The web dispatcher routine evaluates internal management VLAN trust decisions using the client-supplied HTTP host header instead of the actual socket transport layer source IP address. Successful exploitation allows the attacker to bypass IP-filtering access control lists (ACLs) and obtain sensitive device metadata (such as model, serial number, hardware revision, and firmware version) without authentication.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund6 Oct 2026WID-SEC-2026-3779

  Broadcom Fabric OS: Multiple vulnerabilities Translated from German

  CVE-2026-87681CVE-2026-87684CVE-2026-87687+5 more CVEs

[ References ]References

• support.broadcom.com/external/content/SecurityAdvisories/0/39080Vendor Advisory