CVE intelligence and bounded remediation

CVE-2018-12455 — Intelbras Nplug Firmware security vulnerability

High CVSS 9.3

Intelbras NPLUG 1.0.0.14 wireless repeater devices have a critical vulnerability that allows an attacker to authenticate in the web interface just by using "admin:" as the name of a cookie.

Severity
High
CVSS
9.3 (2.0)
Published
2018-10-10
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-287

Affected products

  • intelbras / nplug_firmware / 1.0.0.14

Matched remediation archetype

Authentication bypass and missing authentication

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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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