Vulnerability · CVE-2025-6391
Brocade ASCG before 3.3.0 logs JSON Web Tokens (JWT) in log files.
Published Jul 17, 2025 · catalog updated Jul 18, 2025 · Broadcom Brocade ASCG
Last checked Oct 29, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-6391. EPSS is 0.27%. Act only if a listed version of Broadcom Brocade ASCG is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2025-7397 · Medium
- CVE-2025-7398 · High
- Severity
- High7.1
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.27%
- Remediation
- Version ranges on file
- Affected products
- vendor Broadcom Brocade ASCG before 3.3.0
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Broadcom Brocade ASCG before 3.3.0before 3.3.0
How to fix CVE-2025-6391
Upgrade
CVE-2025-6391 lists a fix boundary at 3.3.0. Compare the installed build with that boundary before you change production.
Version check
Seen in before 3.3.0
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-6391. EPSS is 0.27%. Act only if a listed version of Broadcom Brocade ASCG is installed.
Which versions are affected?
Compare what you have installed with Broadcom Brocade ASCG before 3.3.0 before 3.3.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.27%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Jul 17, 2025 · EUVD
Detected
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.
Jul 18, 2025 · EUVD
Fix available
Broadcom Brocade ASCG before 3.3.0 fixed in 3.3.0
Jul 18, 2025 · EUVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2025-6391
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-6391
30-day exploitation probability 0.27%
first.org - EUVDVulnerability recordEUVD-2025-21828
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.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 23, 2026
- CVE.orgOct 21, 2026
- EUVDOct 21, 2026