---
title: "CVE-2026-87679: Brocade Fabric OS - Buffer Overflow"
description: "Brocade Fabric OS < 10.0.1 contains a buffer overflow caused by lack of boundary checks on user-supplied list strings in trunk configuration operations, letting authenticated administrators cause heap corruption leading to service crash or code execution."
url: https://panop.io/threat-heartbeat/CVE-2026-87679/
---

# CVE-2026-87679 Brocade Fabric OS - Buffer Overflow

Brocade Fabric OS < 10.0.1 contains a buffer overflow caused by lack of boundary checks on user-supplied list strings in trunk configuration operations, letting authenticated administrators cause heap corruption leading to service crash or code execution.

CVSS base score 7.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.36% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-87679)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution, Denial Of Service

CVSS vector

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

Published

8 October 2026

Updated

15 October 2026

Weakness

[CWE-122](https://cwe.mitre.org/data/definitions/122.html)

## Vendor fix

Update to version 10.0.1 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-2026-87679](https://nvd.nist.gov/vuln/detail/CVE-2026-87679)
- [https://support.broadcom.com/external/content/SecurityAdvisories/0/39073](https://support.broadcom.com/external/content/SecurityAdvisories/0/39073)

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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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