CVE-2021-45504

CRITICALNVD 9.69.8▲

9.6

Certain NETGEAR devices are affected by authentication bypass. This affects CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, RBR852 before 3.2.17.12, RBR850 before 3.2.17.12, and RBS850 before 3.2.17.12.

CVSS v3: 9.6
EG Score: 9.8(medium)
EPSS: 60.8%
KEV: Not listed

Published

December 26, 2021

Last Modified

November 21, 2024

References (2)

cve@mitrehttps://kb.netgear.com/000064128/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0475
af854a3a-2127-422b-91ae-364da2661108https://kb.netgear.com/000064128/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0475

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-06 13:46 UTCepss_batch
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2026-06-05 22:45 UTCepss_batch
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2026-05-31 22:29 UTCepss_batch
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2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch

Frequently asked(5)

What is CVE-2021-45504?

CVE-2021-45504 is a critical vulnerability published on December 26, 2021. Certain NETGEAR devices are affected by authentication bypass. This affects CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, RBR852 before 3.2.17.12, RBR850 before 3.2.17.12, and RBS850 before 3.2.17.12.

When was CVE-2021-45504 disclosed?

CVE-2021-45504 was first published in the National Vulnerability Database on December 26, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-45504 actively exploited?

CVE-2021-45504 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 60.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-45504?

CVE-2021-45504 has a CVSS v3 base score of 9.6 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.

How do I remediate CVE-2021-45504?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-45504, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-45504

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-45504?

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Published

Last Modified

References (2)

Frequently asked(5)

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