CVE-2026-87686CWE-290

CVE-2026-87686

Medium · published October 8, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
6.8
In the wild
Unconfirmed
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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
5.3 · CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00176 · 6.8th percentile
Weakness
CWE-290 · Authentication Bypass by Spoofing
Published
2026-10-08T07:16Z
Affected products (1)
ProductVersionsFixed in
broadcom/fabric_operating_system< 10.0.110.0.1
References (1)
https://support.broadcom.com/external/content/SecurityAdvisories/0/39080 · [email protected]
EPSS history
Timeline
  • 09 OCT 03:32Z
    EPSS moved — → 0%
    epss
  • 08 OCT 02:31Z
    An authentication and access control bypass vulnerability exists in the web server management interface of Brocade Fabric OS versions before 10.0.1
    cvelistv5
  • 08 OCT 02:31Z
    An authentication and access control bypass vulnerability exists in the web server management interface of Brocade Fabric OS versions before 10.0.1
    cvelistv5