OS command injection in Brocade Fabric OS diagnostic utilities
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.
Summary
Brocade Fabric OS versions before 9.2.2d and from 10.0.0 through 10.0.0a1 are affected. The maintenance command-line diagnostic utilities fail to sanitize user-supplied input options passed to a shell, an OS command injection flaw (CWE-78). A privileged user with maintenance account access can supply crafted parameters to run arbitrary OS commands with root privileges.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
An OS command injection vulnerability exists in maintenance command-line diagnostic utilities on Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. The binary fails to sanitize user-supplied input options when invoking underlying system commands through a shell interpreter. A privileged user with maintenance account access can exploit this issue by supplying crafted parameters, which results in arbitrary OS command execution with root privileges.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
Upgrade Fabric OS to 9.2.2d, which is the fixed version listed for the before 9.2.2d range. The sources list no fixed version for Fabric OS 10.0.0 through 10.0.0a1.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA Fabric OS (Brocade) Fixed in 9.2.2d
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Brocade Fabric OS 9.2.2d
21 records Highest priority Priority MEDIUM 3 MEDIUM, 18 LOW
Other records, highest priority first
- TI-2026-69357 OS command injection in Brocade Fabric OS time zone managementPriority MEDIUM 44
- TI-2026-69483 Command injection in Brocade Fabric OS WebTools interfacePriority MEDIUM 42
- TI-2026-69481 OS command injection in Brocade Fabric OS REST API interfacePriority MEDIUM 42
Timeline
- 2026-10-08 Threatist record created from CVE-2026-87673
- 2026-10-08 Alias added: GHSA-hq87-mhqf-pfc9
- 2026-10-08 CISA SSVC decision points changed
- 2026-10-08 Priority changed: MEDIUM → LOW
- 2026-10-09 CISA SSVC decision points changed
- 2026-10-15 CVSS score added · NVD
References
More Brocade vulnerabilities
- TI-2025-01721 Code injection exposure in Fabric OS 9.1.0 through 9.1.1d6 KEVCVSS 4.0HIGH 8.6
- TI-2016-06760 Path traversal in Brocade Network Advisor versions released prior to and including 14.0.2 CVSS 3.0CRITICAL 9.8
- TI-2024-19729 hard-coded credentials in the documentation that appear as the appliance root password CVSS 3.1CRITICAL 9.8
- TI-2016-06762 Path traversal in Brocade Network Advisor versions released prior to and including 14.0.2 CVSS 3.0HIGH 7.5
- TI-2018-04739 OS command injection in Brocade Network Advisor CVSS 3.0CRITICAL 9.8
- TI-2016-06761 Path traversal in Brocade Network Advisor versions released prior to and including 14.0.2 CVSS 3.0HIGH 7.5
Sources
- CVE-2026-87673 · CVE Program
- CVE-2026-87673 · NVD
- FIRST EPSS
- GHSA-hq87-mhqf-pfc9 · GitHub Advisory Database · CC BY 4.0
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