CVE intelligence and bounded remediation

CVE-2020-11770 — Certain NETGEAR devices are affected by command injection by an authenticated user

High CVSS 8.8

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects D6220 before 1.0.0.52, D6400 before 1.0.0.86, D7000v2 before 1.0.0.53, D8500 before 1.0.3.44, R6220 before 1.1.0.80, R6250 before 1.0.4.34, R6260 before 1.1.0.64, R6400 before 1.0.1.46, R6400v2 before 1.0.2.66, R6700 before 1.0.2.6, R6700v2 before 1.2.0.36, R6700v3 before 1.0.2.66, R6800 before 1.2.0.36, R6900 before 1.0.2.4, R6900P before 1.3.1.64, R6900v2 before 1.2.0.36, R7000 before 1.0.9.42, R7000P before 1.3.1.64, R7100LG before 1.0.0.50, R7300DST before 1.0.0.70, R7800 before 1.0.2.60, R7900 before 1.0.3.8, R7900P before 1.4.1.30, R8000 before 1.0.4.28, R8000P before 1.4.1.30, R8300 before 1.0.2.128, R8500 before 1.0.2.128, R8900 before 1.0.4.12, R9000 before 1.0.4.12, and XR500 before 2.3.2.32.

Severity
High
CVSS
8.8 (3.1)
Published
2020-04-15
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-77

Affected products

  • netgear / d6220_firmware
  • netgear / d6400_firmware
  • netgear / d8500_firmware
  • netgear / r6220_firmware
  • netgear / r6250_firmware
  • netgear / r6260_firmware

Showing 6 representative product identities from 30 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Command, code, expression, and template injection

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

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

The detailed catalog view below loads this exact record, its source evidence, and the full seven-phase agentic change plan.