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Brocade Fabric OS EUVDEUVD-2026-94654

| CVE-2026-87680 HIGH
OS Command Injection (CWE-78)
2026-10-08 brocade GHSA-v488-875r-phjp
8.5
CVSS 4.0 · Vendor: brocade
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Severity by source

Vendor (brocade) PRIMARY
8.5 HIGH
CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
8.0 HIGH

Adjacent management-network access (AV:A) with valid low-privileged credentials (PR:L); arbitrary OS command execution yields full C/I/A on the switch, so A:H despite the vendor's VA:N.

3.1 AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (brocade).

CVSS VectorVendor: brocade

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Oct 08, 2026 - 02:00 EUVD
Analysis Generated
Oct 08, 2026 - 01:30 vuln.today
CVE Published
Oct 08, 2026 - 00:51 cve.org
HIGH 8.5

DescriptionCVE.org

A command injection vulnerability in the REST API management interface of Brocade Fabric OS versions before 10.0.1 allows an authenticated user to execute arbitrary system commands via crafted input parameters.

AnalysisAI

Command injection in the REST API management interface of Brocade Fabric OS allows an authenticated low-privileged user to execute arbitrary operating-system commands on the affected switch, giving high confidentiality and integrity impact to the attacked system while availability is not directly affected. Only Fabric OS releases before 10.0.1 are affected, and because the CVSS vector requires adjacent-network reachability (AV:A) plus valid credentials (PR:L), the practical attack path runs through the switch management VLAN or an equivalent segmented management plane rather than the public internet. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Requires an authenticated low-privileged account on the Brocade Fabric OS REST API management interface, plus adjacent-network reachability to that interface (AV:A) - typically the switch management VLAN rather than the public internet. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuinely serious but not top-tier remote-exploitation risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch: upgrade to Brocade Fabric OS 10.0.1 or later, which is the first release outside the vulnerable 'before 10.0.1' range; consult the Broadcom/Brocade advisory at https://support.broadcom.com/external/content/SecurityAdvisories/0/39074 for the supported upgrade path and any intermediate fixes for your platform. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all Brocade Fabric OS switches to identify those running versions before 10.0.1, and determine whether the REST API management interface is enabled and reachable from untrusted adjacent network segments; disable the REST API if not required for operations, or if required, restrict access via network ACLs to trusted management VLANs and enforce strong authentication. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-94654 vulnerability details – vuln.today

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