CVE-2026-87686

What it is

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.

At a glance

Exploitability

Can be exploited from the same network segment without logging in. Limited direct impact.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-10-08 03:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-14 14:32 UTC Last updatedMost recent change to the record

Details

Published

2026-10-08 03:16 UTC

Last modified

2026-10-14 14:32 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-290

Record status

Analyzed

Affected

• Broadcom Fabric Operating System < 10.0.1

Attack profile CVSS 4.0 · 5.3

Attack vector

Adjacent network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

None

Confidentiality

Low

Integrity

None

Availability

None