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CVE-2026-87659 Details

Description

A critical authorization bypass vulnerability exists in the Management Server handling of Brocade Fabric OS versions before 10.0.1. A compromised switch connected to the fabric can transmit crafted inband Fibre Channel vendor-unique CT (Common Transport) management requests to bypass administrative authentication. Successful exploitation allows an unauthorized peer switch to execute administrative actions on the target device, including resetting administrative passwords, initiating system reboots, and triggering firmware downloads.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://support.broadcom.com/external/content/SecurityAdvisories/0/39153	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-306	Missing Authentication for Critical Function	[email protected]

Affected Products

Product	Versions
broadcom fabric operating system	< 10.0.1
CPE cpe:2.3:o:broadcom:fabric_operating_system:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 13, 2026	Initial Analysis	[email protected]
Oct 8, 2026	CVE Modified	CISA-ADP
Oct 8, 2026	New CVE Received	[email protected]