Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 0.8%; technical severity is CVSS 8.6.
Brocade Fabric OS versions starting with 9.1.0 have root access removed, however, a local user with admin privilege can potentially execute arbitrary code with full root privileges on Fabric OS versions 9.1.0 through 9.1.1d6.
Who should care
- Teams operating Brocade Fabric OS, Fabric Operating System
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Brocade Fabric OS, Fabric Operating System is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Broadcom Security advisory
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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
- CWE
- CWE-94
- Affected versions
- Broadcom Brocade Fabric OS; Broadcom Fabric Operating System (Start Including 9.1.0, End Excluding 9.1.1d7)
- Fixed versions
- Broadcom Fabric Operating System (Fixed from 9.1.1d7)
- Published
- 24 April 2025
- Attack vector
- Adjacent
- Privileges required
- Low
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 0.8%
- Signal calculated at 65