CVE-2026-87424: A vulnerability in the SupportLink API authentication component of Brocade ASCG versions prior to 3.5.0 allows

Q: How do I fix CVE-2026-87424?

brocade active support connectivity gateway: upgrade to 3.5.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-87424 being exploited?

CVE-2026-87424 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-87424 affect?

CVE-2026-87424 affects brocade active support connectivity gateway. Severity is high (CVSS 8.8). 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.

Routine

HIGH 8.8UPGRADE

CVE-2026-87424 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 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.

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 91%)
CISA exploited list	No
Weakness	CWE-321
Published	2026-10-08
Last modified	2026-10-14

Publisher (CNA): Brocade Communications Systems, LLC · Vendor: broadcom

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-08 07:16 UTCPublished CVE record published
2026-10-14 18:50 UTCUpdated Record last modified

broadcom brocade active support connectivity gateway UPGRADE

Affected: < 3.5.0

Fixed in: 3.5.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy brocade-active-support-connectivity-gateway || rpm -q brocade-active-support-connectivity-gateway || brocade-active-support-connectivity-gateway --version

2. UPGRADE to 3.5.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade brocade-active-support-connectivity-gateway

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade brocade-active-support-connectivity-gateway

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2026-87424?

brocade active support connectivity gateway: upgrade to 3.5.0. Exact commands for each OS are on this page.

Is CVE-2026-87424 being exploited?

CVE-2026-87424 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-2026-87424 affect?

CVE-2026-87424 affects brocade active support connectivity gateway. Severity is high (CVSS 8.8). 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.

How urgent is CVE-2026-87424?

Priority 33/100. High severity

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CVE-2026-87428 HIGH 7.8 UPGRADE In Brocade ASCG before 3.5.0, a local unauthorized user on the ASCG VM who can issue a request to the SANnav
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References

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