CVE intelligence and bounded remediation

CVE-2022-29644 — Totolink A3100R Firmware security vulnerability

Critical CVSS 9.8

TOTOLINK A3100R V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 were discovered to contain a hard coded password for the telnet service stored in the component /web_cste/cgi-bin/product.ini.

Severity
Critical
CVSS
9.8 (3.1)
Published
2022-05-18
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-798

Affected products

  • totolink / a3100r_firmware / 4.1.2cu.5050_b20200504
  • totolink / a3100r_firmware / 4.1.2cu.5247_b20211129

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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