CVE-2026-87679: When Brocade Fabric OS versions before 10.0.1 processes trunk configuration operations, the application parses

Q: How do I fix CVE-2026-87679?

fabric operating system: upgrade to 10.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-87679 being exploited?

CVE-2026-87679 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-2026-87679 affect?

CVE-2026-87679 affects fabric operating system. Severity is high (CVSS 7.2). When Brocade Fabric OS versions before 10.0.1 processes trunk configuration operations, the application parses user-supplied list strings into dynamically allocated heap arrays without enforcing boundary checks on the maximum allowable numb

Routine

HIGH 7.2UPGRADE

CVE-2026-87679 is a high-severity flaw (CVSS 7.2) affecting fabric operating system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When Brocade Fabric OS versions before 10.0.1 processes trunk configuration operations, the application parses user-supplied list strings into dynamically allocated heap arrays without enforcing boundary checks on the maximum allowable number of elements. An authenticated administrator can exploit this vulnerability via crafted REST API requests containing an excessive number of list delimiters, causing heap corruption that can result in service

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-122
Published	2026-10-08
Last modified	2026-10-13

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

Last updated 2026-10-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-08 01:16 UTCPublished CVE record published
2026-10-13 14:17 UTCUpdated Record last modified

broadcom fabric operating system UPGRADE

Affected: < 10.0.1

Fixed in: 10.0.1

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2026-87679?

fabric operating system: upgrade to 10.0.1. Exact commands for each OS are on this page.

Is CVE-2026-87679 being exploited?

CVE-2026-87679 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-2026-87679 affect?

CVE-2026-87679 affects fabric operating system. Severity is high (CVSS 7.2). When Brocade Fabric OS versions before 10.0.1 processes trunk configuration operations, the application parses user-supplied list strings into dynamically allocated heap arrays without enforcing boundary checks on the maximum allowable numb

How urgent is CVE-2026-87679?

Priority 33/100. High severity

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CVE-2026-94585 HIGH 8.8 UPGRADE An authentication bypass vulnerability exists in the web management interface of Brocade Fabric OS versions be
CVE-2026-94581 MEDIUM 6.8 UPGRADE An OS command injection vulnerability exists in the REST API management interface of Brocade Fabric OS version
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References

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