Certain NETGEAR devices are affected by command injection by an authenticated user.

published 2021-12-26 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32359

cvss: 8.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits: 0; none known

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects RBR20 before 2.7.3.22, RBR40 before 2.7.3.22, RBR50 before 2.7.2.102, RBS20 before 2.7.3.22, RBS40 before 2.7.3.22, RBR50 before 2.7.2.102, RBK20 before 2.7.3.22, RBK40 before 2.7.3.22, and RBK50 before 2.7.2.102.

Patch / fix

fixed in 8

netgear rbr20_firmware 2.7.3.22
netgear rbr40_firmware 2.7.3.22
netgear rbr50_firmware 2.7.2.102
netgear rbs20_firmware 2.7.3.22
netgear rbs40_firmware 2.7.3.22
netgear rbk20_firmware 2.7.3.22
netgear rbk40_firmware 2.7.3.22
netgear rbk50_firmware 2.7.2.102

Exploit prediction

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.4	CVSS:3.1/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:C/UI:N
CNA	3.1	8.4	CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD	3.1	6.8	CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	5.2	AV:A/AC:L/Au:S/C:P/I:P/A:P

Classification

Weakness

CWE-77 Improper Neutralization of Special Elements used in a Command

References

kb.netgear.com /000064474/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-WiFi-Systems-PSV-2020-0175
vendor-advisory

Sources

CVE List CVE-2021-45593
NVD CVE-2021-45593

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary