Brocade Fabric OS up to 9.2.2c/10.0.0a1 Inter-Switch Remote Execution Service command injection

Summaryinfo

A vulnerability, which was classified as very critical, was found in Brocade Fabric OS up to 9.2.2c/10.0.0a1. The affected element is an unknown function of the component Inter-Switch Remote Execution Service. Such manipulation leads to command injection. This vulnerability is documented as CVE-2026-87663. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Brocade Fabric OS up to 9.2.2c/10.0.0a1 and classified as very critical. Affected by this issue is some unknown functionality of the component Inter-Switch Remote Execution Service. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An authentication bypass and command injection vulnerability exists in the inter-switch remote execution service of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. When processing remote command execution IPC frames across the fabric, the receiving switch processes these commands at an elevated processing level without proper verification of transmitted parameters. This allows an attacker on a single fabric-connected switch to escalate privileges and execute arbitrary root commands locally or across other managed fabric members where remote execution functionality is enabled.

The advisory is shared for download at support.broadcom.com. This vulnerability is handled as CVE-2026-87663 since 09/09/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/08/2026). The MITRE ATT&CK project declares the attack technique as T1202.

Upgrading to version 9.2.2d eliminates this vulnerability.

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Productinfo

Vendor

• Brocade

Name

• Fabric OS

Version

• 9.2.2a
• 9.2.2b
• 9.2.2c
• 10.0.0a1

License

• commercial

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