Vulnerability · Published Oct 8, 2026 · Assigned by brocade

CVE-2026-87425

High 7.6

In plain English

A high-severity improper certificate validation in Brocade Active Support Connectivity Gateway from Brocade. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).

Severity (CVSS 4.0)7.6High

Exploit odds (30 days)<0.1%top 99.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Brocade	Brocade Active Support Connectivity Gateway	0 – before 3.5.0

Weakness: CWE-295 · 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

References

https://support.broadcom.com/external/content/SecurityAdvisories/0/38392