| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 6.0 | $0-$5k | 0.00 |
Summary
A vulnerability was found in Broadcom Brocade ASCG up to 3.2.x. It has been declared as problematic. The impacted element is an unknown function of the component JWT Handler. Executing a manipulation can lead to log file. This vulnerability is registered as CVE-2025-6391. The attack needs to be launched locally. No exploit is available. It is recommended to upgrade the affected component.
Details
A vulnerability has been found in Broadcom Brocade ASCG up to 3.2.x and classified as problematic. This vulnerability affects some unknown processing of the component JWT Handler. The manipulation with an unknown input leads to a log file vulnerability. The CWE definition for the vulnerability is CWE-532. Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. As an impact it is known to affect confidentiality. CVE summarizes:
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.
The advisory is shared for download at support.broadcom.com. This vulnerability was named CVE-2025-6391 since 06/20/2025. The exploitation appears to be easy. The attack needs to be approached locally. The exploitation requires an enhanced level of successful authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.
Upgrading to version 3.3.0 eliminates this vulnerability.
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Product
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 6.1VulDB Meta Temp Score: 6.0
VulDB Base Score: 2.3
VulDB Temp Score: 2.2
VulDB Vector: 🔒
VulDB Reliability: 🔍
NVD Base Score: 9.8
NVD Vector: 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Log fileCWE: CWE-532 / CWE-200 / CWE-284
CAPEC: 🔒
ATT&CK: 🔒
Physical: Partially
Local: Yes
Remote: Yes
Availability: 🔒
Status: Not defined
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔒
Upgrade: Brocade ASCG 3.3.0
Timeline
06/20/2025 CVE reserved07/18/2025 Advisory disclosed
07/18/2025 VulDB entry created
02/02/2026 VulDB entry last update
Sources
Advisory: support.broadcom.comStatus: Confirmed
CVE: CVE-2025-6391 (🔒)
GCVE (CVE): GCVE-0-2025-6391
GCVE (VulDB): GCVE-100-316840
Entry
Created: 07/18/2025 07:55Updated: 02/02/2026 18:26
Changes: 07/18/2025 07:55 (67), 07/22/2025 15:25 (1), 02/02/2026 18:26 (11)
Complete: 🔍
Cache ID: 216::103
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