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CVE-2025-6391

JSON Web Token (JWT) Exposure in Log Files

Published: Jul 17, 2025Updated: Feb 2, 2026 Sources: CVE List NVDCWE-532
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
0.2%
Top 85.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Brocade ASCG before 3.3.0 logs JSON Web Tokens (JWT) in log files. An attacker with access to the log files can withdraw the unencrypted tokens with security implications, such as unauthorized access, session hijacking, and information disclosure.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-532

Affected Products

Brocade ASCGBroadcom
Mixed
Cloud & SaaS / virtualization
ascgbrocade
On-prem
Networking Infrastructure / router-switch
broadcomcommercialUSCloud & SaaSaka broadcom inc
brocadecommercialUSNetworking Infrastructureaka fabric os, sannav

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Credential Access
View detailed technique mapping

References

https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/35951
support.broadcom.com

Timeline

Published
Jul 17, 2025
Last Updated
Feb 2, 2026

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