PatchTheCVECVE-2026-85421: A critical security vulnerability has been identified in Brocade ASCG versions before 3.5.0
CVE-2026-85421 is a high-severity flaw (CVSS 8.8) affecting brocade active support connectivity gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Adjacent network |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 87%) |
| CISA exploited list | No |
| Weakness | CWE-306 |
| Published | 2026-10-08 |
| Last modified | 2026-10-14 |
Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-85421?
brocade active support connectivity gateway: upgrade to 3.5.0. Exact commands for each OS are on this page.
Is CVE-2026-85421 being exploited?
CVE-2026-85421 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-85421 affect?
CVE-2026-85421 affects brocade active support connectivity gateway. Severity is high (CVSS 8.8). 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
How urgent is CVE-2026-85421?
Priority 34/100. High severity
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- CVE-2026-87425 MEDIUM 6.8 UPGRADE An unauthenticated remote attacker can modify the TLS client trust store in Brocade ASCG versions before 3.5.0