CVE-2021-45508

Name: CVE-2021-45508
Creator: NVD / NIST
Published: 2021-12-26T01:15:13.28+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.14%

Last modified Jun 17, 2026

CVE-2021-45508 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Certain NETGEAR devices are affected by authentication bypass. This affects CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, RBK752 before 3.2.17.12, RBR750 before 3.2.17.12, RBS750 before 3.2.17.12, RBK852 before 3.2.17.12, and RBR850 before 3.2.17.12.. EPSS estimates a 1.14% chance of exploitation in the next 30 days.

Description

Certain NETGEAR devices are affected by authentication bypass. This affects CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, RBK752 before 3.2.17.12, RBR750 before 3.2.17.12, RBS750 before 3.2.17.12, RBK852 before 3.2.17.12, and RBR850 before 3.2.17.12.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.14%

62.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Netgear	Cbr40 Firmware	< 2.5.0.24
Netgear	Cbr750 Firmware	< 4.6.3.6
Netgear	Rbk752 Firmware	< 3.2.17.12
Netgear	Rbr750 Firmware	< 3.2.17.12
Netgear	Rbs750 Firmware	< 3.2.17.12
Netgear	Rbk852 Firmware	< 3.2.17.12
Netgear	Rbr850 Firmware	< 3.2.17.12

References

https://kb.netgear.com/000064133/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0490Patch, Vendor Advisory
https://kb.netgear.com/000064133/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0490Patch, Vendor Advisory

Timeline

Published: Dec 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45508?

How severe is CVE-2021-45508?

CVE-2021-45508 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.14% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45508?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45508?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST