CVE-2025-1976
HighExploitedPublic exploitBrocade 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.
Published Apr 24, 2025 · Updated Feb 26, 2026
Key Facts
Patch immediately- CVE-2025-1976 is a high-severity vulnerability (CVSS 8.6 v4) affecting Fabric Operating System (Broadcom), Fabric OS.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 17, 2025. Public exploit code is available.
- EPSS estimates a 0.7% probability of exploitation in the next 30 days.
- Fixed versions are available, including Fabric Operating System 9.1.1d7.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
8.6
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
EPSS (30-day exploit likelihood)
0.7%
Higher than 51.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-1976 brief as a PDF
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Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Apr 28, 2025 | May 19, 2025 | Not reported |
| Industry KEV feed | Apr 17, 2025 | May 19, 2025 | Not reported |
| CIRCL KEV | Apr 28, 2025 | May 19, 2025 | Not reported |
| ENISA EUVD | Apr 28, 2025 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Fabric Operating SystemBroadcom | See advisory | 9.1.1d7 |
| Fabric OS | >= Fabric OS versions 9.1.0 through 9.1.1d6 | n/a |
Patched Releases
Fabric Operating System
9.1.1d7
Timeline
Added to Industry KEV feed
Apr 17, 2025
Publicly disclosed
Apr 24, 2025
Added to CISA KEV
Apr 28, 2025
Added to CIRCL KEV
Apr 28, 2025
Added to ENISA EUVD
Apr 28, 2025
Last updated
Feb 26, 2026
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
- CWE-94 Improper Control of Generation of Code ('Code Injection')
References
FAQ
Common Questions.
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.
Affected: Fabric Operating System (Broadcom); Fabric OS versions >= Fabric OS versions 9.1.0 through 9.1.1d6. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 17, 2025.
Yes. It was added on Apr 28, 2025 with a federal remediation due date of May 19, 2025.
Public exploit code is available.
Fixed versions are available, including Fabric Operating System 9.1.1d7.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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