CVE intelligence and bounded remediation

CVE-2023-40069 — Elecom Wrc-F1167Acf Firmware security vulnerability

Critical CVSS 9.8

OS command injection vulnerability in ELECOM wireless LAN routers allows an attacker who can access the product to execute an arbitrary OS command by sending a specially crafted request. Affected products and versions are as follows: WRC-F1167ACF all versions, WRC-1750GHBK all versions, WRC-1167GHBK2 all versions, WRC-1750GHBK2-I all versions, and WRC-1750GHBK-E all versions.

Severity
Critical
CVSS
9.8 (3.1)
Published
2023-08-18
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-78

Affected products

  • elecom / wrc-f1167acf_firmware
  • elecom / wrc-1750ghbk_firmware
  • elecom / wrc-1167ghbk2_firmware
  • elecom / wrc-1750ghbk2-i_firmware
  • elecom / wrc-1750ghbk-e_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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