CVE intelligence and bounded remediation

CVE-2021-45511 — Certain NETGEAR devices are affected by authentication bypass

Critical CVSS 9.8

Certain NETGEAR devices are affected by authentication bypass. This affects AC2100 before 2021-08-27, AC2400 before 2021-08-27, AC2600 before 2021-08-27, D7000 before 2021-08-27, R6220 before 2021-08-27, R6230 before 2021-08-27, R6260 before 2021-08-27, R6330 before 2021-08-27, R6350 before 2021-08-27, R6700v2 before 2021-08-27, R6800 before 2021-08-27, R6850 before 2021-08-27, R6900v2 before 2021-08-27, R7200 before 2021-08-27, R7350 before 2021-08-27, R7400 before 2021-08-27, and R7450 before 2021-08-27.

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

Affected products

  • netgear / ac2100_firmware
  • netgear / ac2400_firmware
  • netgear / ac2600_firmware
  • netgear / d7000_firmware
  • netgear / r6220_firmware
  • netgear / r6230_firmware

Showing 6 representative product identities from 17 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authentication bypass and missing authentication

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

Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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