Information Disclosure in Broadcom Brocade Active Support Connectivity Gateway (CVE-2026-87426)
Summary
Vulnerability in Broadcom Brocade Active Support Connectivity Gateway (CVE-2026-87426). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
An unauthenticated network-based attacker can query specific internal management endpoints on Brocade ASCG versions before 3.5.0 to enumerate the configuration details and state of managed Brocade Fabric OS (FOS) switches. This results in the unauthorized disclosure of the customer's SAN fabric management topology and switch connectivity attributes.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-87426 has been found in Broadcom Brocade Active Support Connectivity Gateway.
Risk of unauthorized operations or information disclosure. CVSS score: 4.3/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Broadcom Brocade Active Support Connectivity Gateway CVE-2026-87426" on the vendor's site.
CVE-2026-87426 (Broadcom Brocade Active Support Connectivity Gateway) — CWE-200 / CVSS v3 4.3
Attack vector: adjacent-network / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Information disclosure (CWE-200) exists in Broadcom Brocade Active Support Connectivity Gateway.
Check the vendor advisory for the affected versions of Broadcom Brocade Active Support Connectivity Gateway.
Severity: Medium (CVSS 4.3/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Broadcom Brocade Active Support Connectivity Gateway を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- patch sirt@brocade.com
- web nvd.nist.gov
- web github.com