CVE intelligence and bounded remediation

CVE-2021-45735 — Totolink X5000R Firmware security vulnerability

High CVSS 7.5

TOTOLINK X5000R v9.1.0u.6118_B20201102 was discovered to use the HTTP protocol for authentication into the admin interface, allowing attackers to intercept user credentials via packet capture software.

Severity
High
CVSS
7.5 (3.1)
Published
2022-02-04
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-319

Affected products

  • totolink / x5000r_firmware / 9.1.0u.6118_b20201102

Matched remediation archetype

Cryptography, certificate, signature, and channel validation

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Check exposure

  • Inventory affected algorithms, key uses, trust stores, certificate validation settings, random sources, and plaintext channels across clients and services.
  • Determine which secrets, identities, signatures, or data protections depend on the affected primitive or validation path.
  • Check debug, compatibility, fallback, and hostname or audience override settings in build and runtime configuration.

Remediate safely

  • Use a maintained platform cryptographic API with approved algorithms, modes, parameters, randomness, and full peer identity validation.
  • Remove insecure fallback and validation bypasses; separate keys by purpose and load them from managed secret storage.
  • Plan rotation or reissuance for affected keys, certificates, tokens, hashes, or ciphertext and document compatibility sequencing.

Authoritative sources

Complete CVE record and remediation plan

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