CVE-2026-87683 Memory corruption in Fabric OS
An authenticated attacker can trigger stack-based buffer overflows in the REST API, potentially causing denial of service or arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87683?
CVE-2026-87683 is a high-severity memory corruption vulnerability in Broadcom Fabric Operating System, published on 8 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-121
Which versions are affected by CVE-2026-87683?
It affects 1 product.
Products include Broadcom Fabric Operating System.
How do I fix CVE-2026-87683?
No fix has been published for CVE-2026-87683 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-87683 being exploited?
There is no known exploitation of CVE-2026-87683 in the wild and no public exploit code.
Other vulnerabilities in Broadcom Fabric Operating System
Sources
Also known as GHSA-fmmw-9gq9-8xjm.