CyberSecBulletin
CVE-2026-87424NVD status: Analyzed

Brocade Active Support Connectivity Gateway: Use of Hard-coded Cryptographic Key

Published Updated By the CyberSecBulletin desk

CVE-2026-87424 is a high-severity use of hard-coded cryptographic key vulnerability in Brocade Active Support Connectivity Gateway from Brocade, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists version 3.5.0 as the first without the flaw, so updating Brocade Active Support Connectivity Gateway to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.19% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Brocade Active Support Connectivity Gateway to 3.5.0 or a later version.
  2. Read the advisory on support.broadcom.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
BrocadeBrocade Active Support Connectivity Gatewaybefore 3.5.03.5.0

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
AdjacentThe attacker must be on the same local network segment.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 4.08.6HighCNA (brocade.com)
CVSS 3.18.8HighNVD

Official description

A vulnerability in the SupportLink API authentication component of Brocade ASCG versions prior to 3.5.0 allows an attacker to bypass authentication across deployments due to the use of a hard coded cryptographic key.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Use of Hard-coded Cryptographic Key

The product uses a hard-coded, unchangeable cryptographic key.

How developers prevent this class of flaw

  • Prevention schemes mirror that of hard-coded password storage.

More Use of Hard-coded Cryptographic Key vulnerabilities (CWE-321)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Brocade Active Support Connectivity Gateway

All Brocade Active Support Connectivity Gateway vulnerabilities

Recent Use of Hard-coded Cryptographic Key vulnerabilities

Spotted an error? Tell us.