Information disclosure in Broadcom Brocade Active Support Connectivity Gateway
CVE-2025-6391
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.
EPSS: 0.002 (14.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Broadcom Brocade_active_support_connectivity_gateway
- Broadcom Brocade Ascg — versions before 3.3.0
Weakness classification (CWE)
References
- sirt@brocade.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-6391?
- CVE-2025-6391 is a critical-severity vulnerability in Broadcom Brocade Active Support Connectivity Gateway, classified under Insertion of Sensitive Information into Log File. CVSS score: 9.1/10. Published 2025-07-17.
- How severe is CVE-2025-6391?
- Critical severity. CVSS v3 base score is 9.1 out of 10.