CVE-2026-87660

Storage-fabric disruption via exposed kernel diagnostics

Published Oct 8, 2026 · Updated Oct 8, 2026

Improper permissions in Brocade Fabric OS diagnostics before 9.2.2d and 10.0.0 through 10.0.0a1 allow local users to reset blades. The diagnostic kernel module subsystem exposes privileged hardware tests without adequate file permissions or authorization checks. An unprivileged switch account is required; invoking the tests can force system errors, reset hardware blades, and disrupt storage-fabric operations.

CVSS severity7.0
High
EPSS probability0.11%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper permissions in Brocade Fabric OS diagnostics before 9.2.2d and 10.0.0 through 10.0.0a1 allow local users to reset blades. The diagnostic kernel module subsystem exposes privileged hardware tests without adequate file permissions or authorization checks. An unprivileged switch account is required; invoking the tests can force system errors, reset hardware blades, and disrupt storage-fabric operations.

The record

CVE
CVE-2026-87660
Published
Oct 8, 2026
Updated
Oct 8, 2026
Vendor
Brocade Communications Systems
Product
Fabric OS
Classifications
CWE-732, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <9.2.2d
  2. Affected versionversion=10.0.0 <=10.0.0a1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Brocade Communications Systems · Fabric OSversion=0 <9.2.2d; version=10.0.0 <=10.0.0a1

Published CVSS scores

7.0BroadcomCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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