Authentication Bypass in Brocade ASCG by Broadcom
CVE-2026-87424

8.6HIGH

Key Information:

Vendor

Brocade
Status
Brocade Active Support Connectivity Gateway
Vendor
CVE Published:
8 October 2026

What is CVE-2026-87424?

A security flaw exists in the SupportLink API authentication mechanism of Brocade ASCG versions prior to 3.5.0. This vulnerability enables an attacker to bypass authentication processes by exploiting a hard-coded cryptographic key. As a result, unauthorized individuals could gain access to sensitive operations and data within the application, highlighting the need for immediate patching and improved security practices.

Affected Version(s)

Brocade Active Support Connectivity Gateway 0 < 3.5.0

References

https://support.broadcom.com/external/content/SecurityAdv...

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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