CVE intelligence and bounded remediation

CVE-2018-5469 — Belden Hirschmann Rs20-0900Mmm2Tdau security vulnerability

Critical CVSS 9.8

An 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.

Severity
Critical
CVSS
9.8 (3.0)
Published
2018-03-06
CISA KEV
Not currently listed
Ecosystem
hardware/firmware
Weaknesses
CWE-307

Affected products

  • belden / hirschmann_rs20-0900mmm2tdau
  • belden / hirschmann_rs20-0900nnm4tdau
  • belden / hirschmann_rs20-0900vvm2tdau
  • belden / hirschmann_rs20-1600l2l2sdau
  • belden / hirschmann_rs20-1600l2m2sdau
  • belden / hirschmann_rs20-1600l2s2sdau

Showing 6 representative product identities from 134 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authentication bypass and missing authentication

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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