CVE-2026-0869
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAuthentication bypass in Brocade ASCG 3.4.0 Could allow an unauthorized user to perform ASCG operations related to Brocade Support Link(BSL) and streaming configuration. and could even disable the ASCG application or disable use of BSL data collection on Brocade switches within the fabric.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceAuthentication bypass vulnerability in Brocade ASCG (Application Services Configuration Gateway) version 3.4.0 allows unauthorized users to bypass authentication mechanisms and perform ASCG operations related to Brocade Support Link (BSL) and streaming configuration. An attacker could potentially disable the ASCG application entirely or disable BSL data collection on Brocade switches within the fabric.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 3.4.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm ASCG installation and versionLocate the Brocade ASCG application on your system and retrieve its version number. This is typically found in the application UI under 'About' or 'System Information', or via command line if accessible (e.g., 'ascg --version' or checking installed package metadata).Affected if The installed version is exactly 3.4.0.
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Identify exposed management interfacesCheck network configuration to determine if ASCG management interfaces (HTTP/HTTPS ports, typically 443 or 8443) are accessible from untrusted networks. Review firewall rules and access control lists.Affected if ASCG management interface is exposed to untrusted networks (e.g., internet or guest VLANs).
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Verify BSL configuration statusAccess ASCG configuration panel and examine Brocade Support Link (BSL) settings. Look for BSL data collection status, streaming configuration profiles, and whether BSL is enabled on any connected switches.Affected if BSL or streaming configuration features are enabled and accessible without authentication.
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Audit recent ASCG configuration changesReview ASCG logs and configuration change history for unauthorized or unexpected modifications, particularly: application disablement attempts, BSL collection disablement, or streaming profile changes. Check logs for failed authentication followed by successful operations.Affected if Configuration changes exist that were not initiated by authorized administrators, or authentication logs show bypass patterns.
You are affected if ASCG version 3.4.0 is running and its management interface or BSL/streaming features are accessible without proper authentication.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply vendor-provided patches or upgrades to ASCG 3.4.0; if unavailable, restrict network access to ASCG management interfaces via firewall rules and monitor for unauthorized ASCG configuration changes.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-0869 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-0869 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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