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CVE-2026-87660

HIGH 7

Published 2026-10-08 · Last modified 2026-10-08

An improper file permission and missing authorization vulnerability exists in the diagnostic kernel module subsystem of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. An unprivileged local user can invoke privileged hardware tests, force system error conditions, reset hardware blades, or disrupt storage fabric operations.

ELEVATED IMPACT

Severe if exploited (CVSS 7), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.1%chance of exploitation in 30 days · 1st percentile

○ In CISA KEV ○ Public exploit / PoC

Impact if exploited

7CVSS 4.0 · HIGH

  • ConfidentialityNone
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ⚠Access: Must sit on the same / adjacent network
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ✓Requirements: No special attack requirements

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

Test against your own equipment

curl -s https://vulnpedia.com/cve/CVE-2026-87660/poc.jsonMachine-readable PoC index for this CVE (for automation).

Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-87660/poc.json

Affected

Vendors Brocade Broadcom

Products Fabric Os Fabric Operating System

Weakness (CWE)

  • CWE-732: : Incorrect Permission Assignment for Critical Resource

CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

Known Affected Software Configurations

VendorProductVersion range
BroadcomFabric Operating System< 9.2.2d
BroadcomFabric Operating System≥ 10.0.0 and < 10.0.1

All CVSS metrics

  • HIGH 7 v4.0 · CNA Primary
    CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
  • HIGH 7 v4.0 · NVD Secondary
    CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/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
  • HIGH 7.1 v3.1 · NVD Primary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

References

Advisories

Sources: NVD · CVE.org · EPSS