CVE-2026-87425

TLS Client Trust Store Modification Enabling MITM

Published Oct 8, 2026 CVSS 4.0 · 7.6 High EPSS < 1% KEV · Not listed
Description
An unauthenticated remote attacker can modify the TLS client trust store in Brocade ASCG versions before 3.5.0. By supplying an unauthorized Certificate Authority (CA) certificate to an unauthenticated management interface, the attacker can cause the system to trust unauthorized certificates, potentially enabling Man-in-the-Middle (MITM) attacks against outbound communications with managed switches and peer nodes.

Remediation

Vendor Solution

Security update provided in Brocade ASCG 3.5.0

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:broadcom:brocade_active_support_connectivity_gateway:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Type Values Removed Values Added
First Time appeared Broadcom
Broadcom brocade Active Support Connectivity Gateway
Vendors & Products Broadcom
Broadcom brocade Active Support Connectivity Gateway
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title TLS Client Trust Store Modification Enabling MITM
Type Values Removed Values Added
Description An unauthenticated remote attacker can modify the TLS client trust store in Brocade ASCG versions before 3.5.0. By supplying an unauthorized Certificate Authority (CA) certificate to an unauthenticated management interface, the attacker can cause the system to trust unauthorized certificates, potentially enabling Man-in-the-Middle (MITM) attacks against outbound communications with managed switches and peer nodes.
Weaknesses CWE-295
References
Metrics cvssV4_0

{'score': 7.6, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
brocade
Published
Updated
Oct 8, 2026, 5:54 PM
Reserved
Sep 8, 2026, 9:56 PM
Status
Analyzed
Published
Oct 8, 2026, 7:16 AM
Modified
Oct 14, 2026, 6:50 PM