Missing authentication in Brocade ASCG HTTPS service allows full takeover
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
Brocade Active Support Connectivity Gateway (ASCG) versions before 3.5.0 are affected. The HTTPS service fails to properly enforce authentication or access control checks on incoming requests, a missing authentication flaw (CWE-306). An unauthenticated attacker with network access can issue control commands, alter cluster states, and modify system configurations, which fully compromises the streaming service control plane.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
A critical security vulnerability has been identified in Brocade ASCG versions before 3.5.0. The HTTPS service fails to properly enforce authentication or access control checks on incoming requests. An unauthenticated attacker with network access can issue control commands, alter cluster states, and modify system configurations, leading to a complete compromise of the streaming service control plane.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
Upgrade Brocade Active Support Connectivity Gateway to version 3.5.0.
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-2026-85421
- 2026-10-08 CISA SSVC decision points changed
- 2026-10-08 Priority changed: MEDIUM → LOW
- 2026-10-15 Alias added: GHSA-8gf9-p92h-6gg3
- 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-2026-85421 · CVE Program
- CVE-2026-85421 · NVD
- FIRST EPSS
- GHSA-8gf9-p92h-6gg3 · GitHub Advisory Database · CC BY 4.0
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