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Vulnerability record · CVE-2025-6391 · published 17 July 2025

CVE-2025-6391: Broadcom brocade active support connectivity gateway sensitive information in log file vulnerability

Broadcom · Brocade Active Support Connectivity Gateway

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.

7.1 CVSS 4.0 High EPSS 0.24% · top 86.8% CWE-532 · Sensitive information in log file
7.1CVSS 4.0 base score
0.24%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.6CVE-2025-7398Broadcom brocade active support connectivity gateway inadequate encryption strength vulnerabilityBrocade ASCG before 3.3.0 allows for the use of medium strength cryptography algorithms on internal ports ports 9000 and 8036.EPSS 0.16%8.3CVE-2026-0869Broadcom brocade active support connectivity gateway vulnerabilityAuthentication bypass in Brocade ASCG 3.4.0 Could allow an unauthorized user to perform ASCG operations related to Brocade Support Link(BSL) and stre…EPSS 0.40%7.6CVE-2024-1509Broadcom brocade active support connectivity gateway vulnerabilityBrocade ASCG before 3.2.0 Web Interface is not enforcing HSTS, as defined by RFC 6797. HSTS is an optional response header that can be configured on …EPSS 0.37%4.6CVE-2025-24984Windows NTFS logs sensitive information, enabling physical-attack disclosureWindows NTFS writes sensitive information into a log file, which an attacker can read to disclose data. The flaw is rated CVSS 3.1 4.6 (Medium) and a…KEVEPSS 2.0%analysed4.4CVE-2023-21492Samsung Android kernel pointer logging enables ASLR bypassSamsung Android devices log kernel pointers to a log file before the SMR May-2023 Release 1 fix. A privileged local attacker who can read those logs …KEVEPSS 2.6%analysed

Source: NIST National Vulnerability Database (record CVE-2025-6391), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.