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Vulnerabilities

Vulnerability · CVE-2026-85421

A critical security vulnerability has been identified in Brocade ASCG versions before 3.5.0.

Published Oct 8, 2026 · catalog updated Oct 14, 2026 · Brocade Brocade Active Support Connectivity Gateway

Check if you run it

No confirmed exploitation is on record for CVE-2026-85421. EPSS is 0.22%. Act only if a listed version of Brocade Brocade Active Support Connectivity Gateway is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Advisory link
Affected products
cpe broadcom/brocade active support connectivity gateway · vendor Brocade Brocade Active Support Connectivity Gateway

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe broadcom/brocade active support connectivity gatewayversion unspecified
  • vendor Brocade Brocade Active Support Connectivity Gatewayversion unspecified

How to fix CVE-2026-85421

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-85421. EPSS is 0.22%. Act only if a listed version of Brocade Brocade Active Support Connectivity Gateway is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-306: Missing Authentication for Critical Function. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 8, 2026 · NIST NVD

    Detected

    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 pla

  2. Oct 14, 2026 · NIST NVD

    Updated

    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 pla

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-2026-85421

    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

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2026-85421

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-85421

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-85421

    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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.