CVE-2026-87681NVD

Vulnerability Summary

An Access Control Bypass vulnerability exists in the Role-Based Access Control (RBAC) validation engine of Brocade Fabric OS versions before 10.0.1. When processing certain management protocol operations, the RBAC engine incorrectly categorizes non-standard action opcodes during permission checks. This allows authenticated users with read-only management privileges to bypass access controls and execute restricted administrative operations.

Severity Level

HIGH(7.1)

Published Date

Oct 8, 2026

Last Modified

Oct 8, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

Data Pending

Root Weakness (CWE)

CWE-269: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v4.0 Base Metrics — Score 7.1 (HIGH)

Attack VectorAdjacent

Attack ComplexityLow

Attack RequirementsNone

Privileges RequiredLow

User InteractionNone

Confidentiality (Vulnerable System)Low

Integrity (Vulnerable System)High

Availability (Vulnerable System)High

Confidentiality (Subsequent System)None

Integrity (Subsequent System)None

Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions

Brocade Fabric OS < 10.0.1

Patched Versions

Brocade Fabric OS 10.0.1

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