CVE intelligence and bounded remediation

CVE-2021-44259 — Wavlink Wl-Wn531G3 Firmware security vulnerability

Critical CVSS 9.8

A vulnerability is in the 'wx.html' page of the WAVLINK AC1200, version WAVLINK-A42W-1.27.6-20180418, which can allow a remote attacker to access this page without any authentication. When an unauthorized user accesses this page directly, it connects to this device as a friend of the device owner.

Severity
Critical
CVSS
9.8 (3.1)
Published
2022-03-17
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-306

Affected products

  • wavlink / wl-wn531g3_firmware / a42w-1.27.6-20180418

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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