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Known exploited vulnerability

CVE-2025-1976

highCVSS 4.0 8.6In CISA KEVEPSS 0.69%Published · Brocade

The short answer

CVE-2025-1976 affects Brocade Fabric OS and is rated high (CVSS 8.6). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-04-28: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-94, CWE-78.

Severity

8.6 high

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

Exploited (CISA KEV)

Yes, since Apr 28, 2025

Federal due date May 19, 2025

EPSS, next 30 days

0.69%

Higher than 53% of scored CVEs

How it can be exploited

Attack vector
Adjacent network
Attack complexity
Low
Attack requirements
None
Privileges required
Low
User interaction
None
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

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

Fabric OS. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2025-1976 being exploited?

Yes. CISA added CVE-2025-1976 to its Known Exploited Vulnerabilities catalog on 2025-04-28, with a federal remediation due date of 2025-05-19.

How do I fix CVE-2025-1976?

CISA's 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.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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