Brocade Fabric OS up to 10.0.0 REST API Management stack-based overflow

Summaryinfo

A vulnerability was found in Brocade Fabric OS up to 10.0.0. It has been classified as very critical. This affects an unknown function of the component REST API Management. Performing a manipulation results in stack-based overflow. This vulnerability was named CVE-2026-87683. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Brocade Fabric OS up to 10.0.0. It has been classified as very critical. This affects an unknown code block of the component REST API Management. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at support.broadcom.com. This vulnerability is uniquely identified as CVE-2026-87683 since 09/09/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/08/2026).

Upgrading to version 10.0.1 eliminates this vulnerability.

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Productinfo

Vendor

• Brocade

Name

• Fabric OS

Version

• 10.0

License

• commercial

CPE 2.3info

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CPE 2.2info

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