CVE intelligence and bounded remediation

CVE-2021-45512 — Certain NETGEAR devices are affected by weak cryptography

Critical CVSS 9.8

Certain NETGEAR devices are affected by weak cryptography. This affects D7000v2 before 1.0.0.62, D8500 before 1.0.3.50, EX3700 before 1.0.0.84, EX3800 before 1.0.0.84, EX6120 before 1.0.0.54, EX6130 before 1.0.0.36, EX7000 before 1.0.1.90, R6250 before 1.0.4.42, R6400v2 before 1.0.4.98, R6700v3 before 1.0.4.98, R6900P before 1.3.2.124, R7000 before 1.0.11.106, R7000P before 1.3.2.124, R7100LG before 1.0.0.56, R7900 before 1.0.4.26, R8000 before 1.0.4.58, R8300 before 1.0.2.134, R8500 before 1.0.2.134, RS400 before 1.5.0.48, WNR3500Lv2 before 1.2.0.62, and XR300 before 1.0.3.50.

Severity
Critical
CVSS
9.8 (3.1)
Published
2021-12-26
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-327

Affected products

  • netgear / d7000_firmware
  • netgear / d8500_firmware
  • netgear / ex3700_firmware
  • netgear / ex3800_firmware
  • netgear / ex6120_firmware
  • netgear / ex6130_firmware

Showing 6 representative product identities from 21 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Cryptography, certificate, signature, and channel validation

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

Check exposure

  • Inventory affected algorithms, key uses, trust stores, certificate validation settings, random sources, and plaintext channels across clients and services.
  • Determine which secrets, identities, signatures, or data protections depend on the affected primitive or validation path.
  • Check debug, compatibility, fallback, and hostname or audience override settings in build and runtime configuration.

Remediate safely

  • Use a maintained platform cryptographic API with approved algorithms, modes, parameters, randomness, and full peer identity validation.
  • Remove insecure fallback and validation bypasses; separate keys by purpose and load them from managed secret storage.
  • Plan rotation or reissuance for affected keys, certificates, tokens, hashes, or ciphertext and document compatibility sequencing.

Authoritative sources

Complete CVE record and remediation plan

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