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CVE-2025-6391

Broadcom Brocade Active Support Connectivity Gateway information disclosure

9.1 CRITICALEPSS 0.25%
  1. Published17 Jul 2025

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
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≤ 3.2.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2025-6391 being actively exploited?

CVE-2025-6391 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.25%.

How severe is CVE-2025-6391?

CVE-2025-6391 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.25% probability of exploitation.

Which products are affected by CVE-2025-6391?

Affected products include Broadcom Brocade Active Support Connectivity Gateway.

How do I fix CVE-2025-6391?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-6391 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.