OS command injection in Brocade Fabric OS account deletion
Key facts
- Attack vector
- Adjacent network
- Privileges required
- High
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- Present
- 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 before 9.2.2d and 10.0.0 through 10.0.0a1 contains an OS command injection flaw (CWE-78) in its account management subsystem. Malformed account names that Fabric OS previously accepted can cause shell metacharacters to execute during the internal key cleanup that runs when an administrator deletes the account. An attacker with high privileges on an adjacent network can trigger the command injection.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
An OS command injection vulnerability exists in the account management subsystem of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. When an administrator initiates an account deletion, the system invokes an internal maintenance routine to clean up cryptographic keys associated with the target account. Malformed account names previously accepted by Fabric OS can cause the execution of embedded shell metacharacters, triggering command injection.
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 Brocade Fabric OS to 9.2.2d, which fixes this flaw.
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-2026-87677
- 2026-10-08 CISA SSVC decision points changed
- 2026-10-08 Priority changed: MEDIUM → LOW
- 2026-10-15 Alias added: GHSA-fw7w-5rwg-xvrv
- 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-2026-87677 · CVE Program
- CVE-2026-87677 · NVD
- FIRST EPSS
- GHSA-fw7w-5rwg-xvrv · GitHub Advisory Database · CC BY 4.0
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