---
title: "CVE-2026-87424: Brocade ASCG - Authentication Bypass"
description: "Brocade ASCG < 3.5.0 contains a broken authentication caused by use of a hard coded cryptographic key in SupportLink API authentication, letting attackers bypass authentication across deployments, exploit requires no special conditions."
url: https://panop.io/threat-heartbeat/CVE-2026-87424/
---

# CVE-2026-87424 Brocade ASCG - Authentication Bypass

Brocade ASCG < 3.5.0 contains a broken authentication caused by use of a hard coded cryptographic key in SupportLink API authentication, letting attackers bypass authentication across deployments, exploit requires no special conditions.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-87424)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

8 October 2026

Updated

15 October 2026

Weakness

[CWE-321](https://cwe.mitre.org/data/definitions/321.html)

## Vendor fix

Upgrade to version 3.5.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-87424](https://nvd.nist.gov/vuln/detail/CVE-2026-87424)
- [https://support.broadcom.com/external/content/SecurityAdvisories/0/38391](https://support.broadcom.com/external/content/SecurityAdvisories/0/38391)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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