CVE-2018-5469
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 · uneditedAn Improper Restriction of Excessive Authentication Attempts issue was discovered in Belden Hirschmann RS, RSR, RSB, MACH100, MACH1000, MACH4000, MS, and OCTOPUS Classic Platform Switches. An improper restriction of excessive authentication vulnerability in the web interface has been identified, which may allow an attacker to brute force authentication.
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 · high confidenceThe web interface on affected Belden Hirschmann industrial switches lacks proper restrictions on authentication attempts, enabling attackers to perform unlimited brute force login attempts. This allows unauthorized access to the device management interface.
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 dataall versionsall versionsall versionsall versionsall versionsall versionsall versionsall versionsCVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/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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Identify device modelAccess the device console, web interface, or management system and retrieve the exact model number (e.g., Rs20 0900mmm2tdau). Compare against the list of affected models: Rs20 0900mmm2tdau, Rs20 0900nnm4tdau, Rs20 0900vvm2tdau, Rs20 1600l2l2sdau, Rs20 1600l2m2sdau, Rs20 1600l2s2sdau, Rs20 1600l2t1sdau, Rs20 1600m2m2sdau.Affected if The device model matches one of the listed affected models and runs any firmware version (all versions are affected).
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Verify web interface is enabledAttempt to access the device web interface via HTTP/HTTPS on the management IP address. Check device configuration for web server status.Affected if The web management interface is accessible and enabled on the device.
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Check web interface network exposureReview network configuration, firewall rules, or VLAN assignment to determine if the web interface is reachable from untrusted networks (e.g., guest VLANs, internet-facing interfaces, or the general corporate network rather than an isolated management network).Affected if The web interface is reachable from networks that are not strictly controlled or are considered untrusted.
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Review authentication logs for brute force patternsAccess device logs or syslog output and search for repeated failed login attempts from the same source IP, rapid successive authentication attempts, or evidence of credential guessing.Affected if Logs show repeated failed login attempts indicating the device is subject to or has experienced brute force attacks.
The device is affected if it is one of the listed Rs20 models with the web interface enabled and accessible, particularly if exposed to untrusted networks, since the vulnerability allows unlimited authentication attempts without any lockout protection.
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 firmware updates when available. In the interim, restrict web interface access via network segmentation, IP ACLs, or place devices behind a WAF. Monitor for anomalous authentication patterns.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-5469 — 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-2018-5469 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
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