Information disclosure in Brocade ASCG exposes SAN fabric topology
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200.
Summary
Brocade Active Support Connectivity Gateway (ASCG) versions before 3.5.0 expose specific internal management endpoints. An unauthenticated network-based attacker can query these endpoints to enumerate the configuration details and state of managed Brocade Fabric OS (FOS) switches, leading to unauthorized disclosure of the customer's SAN fabric management topology and switch connectivity attributes (CWE-200).
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
An unauthenticated network-based attacker can query specific internal management endpoints on Brocade ASCG versions before 3.5.0 to enumerate the configuration details and state of managed Brocade Fabric OS (FOS) switches. This results in the unauthorized disclosure of the customer's SAN fabric management topology and switch connectivity attributes.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
Brocade ASCG users should upgrade to version 3.5.0, the fixed version.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA Brocade Active Support Connectivity Gateway (Brocade) Fixed in 3.5.0
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Brocade Active Support Connectivity Gateway 3.5.0
12 records Highest priority Priority LOW 12 LOW
Other records, highest priority first
- TI-2026-69450 Missing authentication in Brocade ASCG management servicePriority LOW 39
- TI-2026-69448 Path traversal in Brocade ASCG HTTP service allows arbitrary file accessPriority LOW 39
- TI-2026-69447 Eval injection in Brocade Active Support Connectivity GatewayPriority LOW 39
Timeline
- 2026-10-08 Threatist record created from CVE-2026-87426
- 2026-10-08 CISA SSVC decision points changed
- 2026-10-15 Alias added: GHSA-c348-g24g-jfxx
- 2026-10-15 CVSS score added · NVD
References
More Brocade vulnerabilities
- TI-2025-01721 Code injection exposure in Fabric OS 9.1.0 through 9.1.1d6 KEVCVSS 4.0HIGH 8.6
- TI-2016-06760 Path traversal in Brocade Network Advisor versions released prior to and including 14.0.2 CVSS 3.0CRITICAL 9.8
- TI-2024-19729 hard-coded credentials in the documentation that appear as the appliance root password CVSS 3.1CRITICAL 9.8
- TI-2016-06762 Path traversal in Brocade Network Advisor versions released prior to and including 14.0.2 CVSS 3.0HIGH 7.5
- TI-2018-04739 OS command injection in Brocade Network Advisor CVSS 3.0CRITICAL 9.8
- TI-2016-06761 Path traversal in Brocade Network Advisor versions released prior to and including 14.0.2 CVSS 3.0HIGH 7.5
Sources
- CVE-2026-87426 · CVE Program
- CVE-2026-87426 · NVD
- FIRST EPSS
- GHSA-c348-g24g-jfxx · GitHub Advisory Database · CC BY 4.0
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