CVE intelligence and bounded remediation

CVE-2017-18858 — Certain NETGEAR devices are affected by command execution

Critical CVSS 9.8

Certain NETGEAR devices are affected by command execution. This affects M4200-10MG-POE+ 12.0.2.11 and earlier, M4300-28G 12.0.2.11 and earlier, M4300-52G 12.0.2.11 and earlier, M4300-28G-POE+ 12.0.2.11 and earlier, M4300-52G-POE+ 12.0.2.11 and earlier, M4300-8X8F 12.0.2.11 and earlier, M4300-12X12F 12.0.2.11 and earlier, M4300-24X24F 12.0.2.11 and earlier, M4300-24X 12.0.2.11 and earlier, and M4300-48X 12.0.2.11 and earlier.

Severity
Critical
CVSS
9.8 (3.1)
Published
2020-04-28
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-78

Affected products

  • netgear / m4200-10mg-poe+_firmware
  • netgear / m4300-28g_firmware
  • netgear / m4300-52g_firmware
  • netgear / m4300-28g-poe+_firmware
  • netgear / m4300-52g-poe+_firmware
  • netgear / m4300-8x8f_firmware

Showing 6 representative product identities from 10 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

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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