High severity · published Oct 8, 2026
CVE-2026-87664
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
7.8
CVSS
0.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Fabric OS · Brocade
before 9.2.2d; 10.0.0 through 10.0.0a1 · source: vendor
FO
Fabric Operating System · Broadcom
before 9.2.2d; 10.0.0 before 10.0.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-87664
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-87664
support.broadcom.com
https://support.broadcom.com/external/content/SecurityAdvisories/0/39164
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