Unauthenticated topology disclosure via internal management endpoints
Published Oct 8, 2026 · Updated Oct 8, 2026
Information disclosure in Brocade Active Support Connectivity Gateway before 3.5.0 allows remote attackers to read switch topology. Internal management endpoints return managed Fabric OS switch configuration and state without authentication; endpoint paths and faulty access-control code are undisclosed. Access requires network reachability, with the vendor assessment specifying an adjacent-network attacker, and exposes SAN topology and connectivity attributes rather than modifying switches.
Summary
What happened
Information disclosure in Brocade Active Support Connectivity Gateway before 3.5.0 allows remote attackers to read switch topology. Internal management endpoints return managed Fabric OS switch configuration and state without authentication; endpoint paths and faulty access-control code are undisclosed. Access requires network reachability, with the vendor assessment specifying an adjacent-network attacker, and exposes SAN topology and connectivity attributes rather than modifying switches.
The record
- CVE
- CVE-2026-87426
- Published
- Oct 8, 2026
- Updated
- Oct 8, 2026
- Vendor
- Brocade Communications Systems
- Product
- Brocade Active Support Connectivity Gateway
- Classifications
- T1016
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 8, 2026CVE publishedPublication date reported by the CVE source.
- Oct 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <3.5.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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