Brocade ASCG: Insufficiently protected credentials allow theft of SANnav credentials
Summary
Brocade Active Support Connectivity Gateway (ASCG) before 3.5.0 stores management credentials for onboarded SANnav instances insufficiently protected. A local unauthorized user on the ASCG VM who can send a request to the SANnav host network namespace can extract these credentials. With them, an attacker can compromise the connected SANnav servers or the managed Brocade Fibre Channel switches.
Affected
- Brocade ASCG versions before 3.5.0
Fixed in
- Upgrade to Brocade ASCG 3.5.0 or later.
Workaround
- Unknown. The sources list only the upgrade as a remediation.
- Restrict shell and console access to the ASCG VM (own recommendation, not from the vendor).
Exploitation
- No known exploitation in the wild.
- No public exploit found.
- CISA SSVC: exploitation none, not automatable, partial technical impact.
Our recommendation
- Check whether ASCG is deployed and which version runs.
- Upgrade to ASCG 3.5.0 or later. The same release also fixes other ASCG flaws, some of which are unauthenticated (for example CVE-2026-85489, CVE-2026-87424, CVE-2026-85423), so prioritise the upgrade if ASCG is reachable outside the management network.
- After the upgrade, rotate the SANnav and switch credentials stored in ASCG.
- Review which accounts have local access to the ASCG VM.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Broadcom Security Advisory 38390 support.broadcom.com
- VulDB: CVE-2026-87428 vuldb.com
- PSIRT: CVE-2026-87428 psirt.com
- Vulners: RAPID7 CVE-2026-87428 vulners.com
- SANnav FAQ (Broadcom) docs.broadcom.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 12:43.
Original description (NVD)
In Brocade ASCG before 3.5.0, a local unauthorized user on the ASCG VM who can issue a request to the SANnav host network namespace can extract stored management credentials for onboarded SANnav instances and compromise connected Brocade SANnav servers or managed Brocade Fibre Channel switches.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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