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Vulnerability record · CVE-2021-45661 · published 26 December 2021

CVE-2021-45661: Netgear rbk40 firmware injection vulnerability

Netgear · Rbk40 Firmware

Certain NETGEAR devices are affected by server-side injection. This affects RBK40 before 2.5.1.16, RBR40 before 2.5.1.16, RBS40 before 2.5.1.16, RBK20 before 2.5.1.16, RBR20 before 2.5.1.16, RBS20 before 2.5.1.16, RBK50 before 2.5.1.16, RBR50 before 2.5.1.16, RBS50 before 2.5.1.16, and RBS50Y before 2.6.1.40.

7.8 CVSS 3.1 High EPSS 0.31% · top 77.9% CWE-74 · Injection
7.8CVSS 3.1 base score, v2 4.6
0.31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
10Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Certain NETGEAR devices are affected by server-side injection. This affects RBK40 before 2.5.1.16, RBR40 before 2.5.1.16, RBS40 before 2.5.1.16, RBK20 before 2.5.1.16, RBR20 before 2.5.1.16, RBS20 before 2.5.1.16, RBK50 before 2.5.1.16, RBR50 before 2.5.1.16, RBS50 before 2.5.1.16, and RBS50Y before 2.6.1.40.

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

Affected products

10 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://kb.netgear.com/000064065/Security-Advisory-for-Server-Side-Injection-on-Some-WiFi-Systems-PSV-2019-0134 PatchVendor Advisory
https://kb.netgear.com/000064065/Security-Advisory-for-Server-Side-Injection-on-Some-WiFi-Systems-PSV-2019-0134 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-45658Netgear d7800 firmware injection vulnerabilityCertain NETGEAR devices are affected by server-side injection. This affects D7800 before 1.0.1.58, DM200 before 1.0.0.66, EX2700 before 1.0.1.56, EX6…EPSS 0.82%9.8CVE-2021-45619Netgear ex6250 firmware command injection vulnerabilityCertain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects EX6200v2 before 1.0.1.86, EX6250 before 1.0.0.…EPSS 2.5%9.8CVE-2021-45618Netgear d7800 firmware command injection vulnerabilityCertain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects D7800 before 1.0.1.64, EX6200v2 before 1.0.1.8…EPSS 2.0%9.8CVE-2021-38530Netgear rbk40 firmware command injection vulnerabilityCertain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects RBK40 before 2.5.1.16, RBR40 before 2.5.1.16, …EPSS 2.2%9.8CVE-2021-38527Netgear cbr40 firmware command injection vulnerabilityCertain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects CBR40 before 2.5.0.14, EX6100v2 before 1.0.1.9…EPSS 1.7%9.8CVE-2021-38516Netgear d6220 firmware vulnerabilityCertain NETGEAR devices are affected by lack of access control at the function level. This affects D6220 before 1.0.0.48, D6400 before 1.0.0.82, D700…EPSS 1.3%9.8CVE-2020-35799Netgear d3600 firmware out-of-bounds write vulnerabilityCertain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects D3600 before 1.0.0.76, D6000 befor…EPSS 1.2%9.8CVE-2020-35795Netgear ac2100 firmware classic buffer overflow vulnerabilityCertain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects AC2100 before 1.2.0.72, AC2400 before 1.2.0.72…EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2021-45661), CISA KEV, FIRST EPSS (scores of 2026-10-06). This page is refreshed as NVD updates the record.