CVE intelligence and bounded remediation

CVE-2021-45602 — Certain NETGEAR devices are affected by command injection by an authenticated user

High CVSS 7.8

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects D7800 before 1.0.1.66, EX2700 before 1.0.1.68, WN3000RPv2 before 1.0.0.90, WN3000RPv3 before 1.0.2.100, LBR1020 before 2.6.5.20, LBR20 before 2.6.5.32, R6700AX before 1.0.10.110, R7800 before 1.0.2.86, R8900 before 1.0.5.38, R9000 before 1.0.5.38, RAX10 before 1.0.10.110, RAX120v1 before 1.2.3.28, RAX120v2 before 1.2.3.28, RAX70 before 1.0.10.110, RAX78 before 1.0.10.110, XR450 before 2.3.2.130, XR500 before 2.3.2.130, and XR700 before 1.0.1.46.

Severity
High
CVSS
7.8 (3.1)
Published
2021-12-26
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-78

Affected products

  • netgear / d7800_firmware
  • netgear / ex2700_firmware
  • netgear / wn3000rpv2_firmware
  • netgear / wn3000rpv3_firmware
  • netgear / lbr1020_firmware
  • netgear / lbr20_firmware

Showing 6 representative product identities from 18 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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