CVE intelligence and bounded remediation

CVE-2023-37565 — Elecom Wrc-1167Ghbk-S Firmware security vulnerability

High CVSS 8

Code injection vulnerability in ELECOM wireless LAN routers allows a network-adjacent authenticated attacker to execute arbitrary code by sending a specially crafted request. Affected products and versions are as follows: WRC-1167GHBK-S v1.03 and earlier, WRC-1167GEBK-S v1.03 and earlier, WRC-1167FEBK-S v1.04 and earlier, WRC-1167GHBK3-A v1.24 and earlier, and WRC-1167FEBK-A v1.18 and earlier.

Severity: High
CVSS: 8 (3.1)
Published: 2023-07-13
CISA KEV: Not currently listed
Ecosystem: operating-system
Weaknesses: CWE-94

Affected products

elecom / wrc-1167ghbk-s_firmware
elecom / wrc-1167gebk-s_firmware
elecom / wrc-1167febk-s_firmware
elecom / wrc-1167ghbk3-a_firmware
elecom / wrc-1167febk-a_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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