8.5

CVE-2026-87664: broadcom fabric_operating_system

CVSS: 8.5v4.0HighAnalyzed
Published 08-10-2026Last modified 09-10-2026
Open JSON

Vulnerability summary

CVE-2026-87664 is a high (CVSS 8.5) vulnerability in broadcom fabric_operating_system. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.6% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.5/10
010
High · v4.0 (CVE.org)
EPSS score
0.12%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-10-2026
    PublishedVulnerability first disclosed.
  2. 09-10-2026
    Last modifiedVulnerability information updated.

Description

A session context forgery vulnerability exists in the web management daemon of Brocade Fabric OS versions 9.2.2d and 10.0.0 through 10.0.0a1. When processing local inter-process communication (IPC) storage callbacks, the service accepts and registers session structures including administrative role permissions, user identifiers, and authorization flags—without verifying the identity or authenticity of the sending process. An attacker can obtain elevated administrative privileges on the web management interface without legitimate authentication.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

08-10-202621-10-2026
EPSS score
0.12%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Broadcom1 product
Brocade1 product

2 vendors · 2 products

References

1 links