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CVE-2026-87683

8.8, high

Brocade Fabric OS Stack-based Buffer Overflow Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.8, high high CVSS v3.1
EPSS, next 30 days
0.5% higher than 40% of scored CVEs
Exploitation
No public evidence
Published
8 Oct 20269 days ago

Description

Multiple stack-based buffer overflow vulnerabilities exist in the REST API management component of Brocade Fabric OS versions prior to 10.0.1. When processing API request payloads (such as device configuration attributes or port mapping requests) the REST API service fails to properly validate incoming array counts and string lengths against internal buffer capacities. An authenticated attacker with REST API access can transmit crafted, oversized request parameters to induce memory corruption on the execution stack. This may result in a denial-of-service condition (daemon crash) or potential arbitrary code execution within the management process context.

Details

Vendor
Brocade
Product
Fabric OS
Weakness
CWE-121 (opens in a new tab)
Status
Analyzed
Updated
13 Oct 2026
Assigner
sirt@brocade.com

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

References 1

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Brocade CVEs

Every Brocade CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-87659 Brocade Fabric OS Missing Authentication for Critical Function Vulnerability EPSS 0.2% 9.8, critical
  • CVE-2026-87679 Brocade Fabric OS Heap-based Buffer Overflow Vulnerability EPSS 0.4% 7.2, high
  • CVE-2026-87680 Brocade Fabric OS OS Command Injection Vulnerability EPSS 2% 8.8, high
  • CVE-2026-87682 Brocade Fabric OS OS Command Injection Vulnerability EPSS 2% 8.8, high
  • CVE-2026-87665 Brocade Fabric OS Stack-based Buffer Overflow Vulnerability EPSS 0.8% 7.5, high
  • CVE-2026-87671 Brocade Fabric OS Out-of-Bounds Read Vulnerability EPSS 0.4% 7.5, high
  • CVE-2026-87684 Brocade Fabric OS Stack-based Buffer Overflow Vulnerability EPSS 0.6% 9.8, critical
  • CVE-2026-94578 Brocade Fabric OS Improper Privilege Management Vulnerability EPSS 0.4% 8.8, high

Beyond this page

Is CVE-2026-87683 in your network?

This page tells you how dangerous CVE-2026-87683 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.