What is CVE-2021-45511?

CVE-2021-45511 is a medium-severity vulnerability in NETGEAR Ac2100. CVSS score: 6.8/10. Published 2021-12-26.

How severe is CVE-2021-45511?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Is CVE-2021-45511 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in NETGEAR Ac2100

CVE-2021-45511

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.

Published 2021-12-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.176 (97.1th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.176 · newest: 0.176 · change: 0.000

Affected products

Public proof-of-concept exploits

rapid7/metasploit-framework

References

kb.netgear.com/000063961/Security-Advisory-for-Authentication-Bypass-Vulnerabil… (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-45511?: CVE-2021-45511 is a medium-severity vulnerability in NETGEAR Ac2100. CVSS score: 6.8/10. Published 2021-12-26.
How severe is CVE-2021-45511?: Medium severity. CVSS v3 base score is 6.8 out of 10.
Is CVE-2021-45511 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.