CVE intelligence and bounded remediation

CVE-2023-31188 — Multiple TP-LINK products allow a network-adjacent authenticated attacker to execute arbitrary OS commands

High CVSS 8

Multiple TP-LINK products allow a network-adjacent authenticated attacker to execute arbitrary OS commands. Affected products/versions are as follows: Archer C50 firmware versions prior to 'Archer C50(JP)_V3_230505', Archer C55 firmware versions prior to 'Archer C55(JP)_V1_230506', and Archer C20 firmware versions prior to 'Archer C20(JP)_V1_230616'.

Severity
High
CVSS
8 (3.1)
Published
2023-09-06
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-78

Affected products

  • tp-link / archer_c55_firmware
  • tp-link / archer_c50_v3_firmware

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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