CVE-2026-87681: CWE-269: Improper Privilege Management Summary in Brocade Fabric OS
Description
CVE-2026-87681 is an access control bypass vulnerability in Brocade Fabric OS prior to version 10.0.1. The flaw lies in the Role-Based Access Control (RBAC) validation engine, which incorrectly handles certain non-standard action opcodes during permission checks. This allows authenticated users with read-only privileges to perform restricted administrative operations.
CVSS v4.0
Score 7.1high
Affected software
Brocade
Fabric OS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects Brocade Fabric OS versions before 10.0.1. The RBAC engine misclassifies non-standard action opcodes when validating permissions for management protocol operations. As a result, users with read-only management privileges can bypass access controls and execute administrative commands that should be restricted. The CVSS 4.0 base score is 7.1, indicating a high severity level. No known exploits are reported in the wild, and no vendor patch or advisory details are provided in the input data.
Potential Impact
Authenticated users with read-only management privileges can bypass RBAC controls and perform restricted administrative operations. This could lead to unauthorized configuration changes or other administrative actions that compromise the security or stability of the affected Brocade Fabric OS devices.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict read-only user access to trusted personnel only and monitor for unusual administrative activity.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- brocade
- Date Reserved
- 2026-09-08T22:51:12.186Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac6ef842cdf04f656b74228
Added to database: 10/08/2026, 01:19:00 UTC
Last enriched: 10/08/2026, 01:33:15 UTC
Last updated: 10/08/2026, 01:33:15 UTC
Views: 6
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