CVE-2021-45623

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-26 · updated 2026-06-17
Weakness: CWE-77

Description

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects R7800 before 1.0.2.74, R9000 before 1.0.5.2, and XR500 before 2.3.2.66.

Affected products

NETGEAR R7800 Firmware: before 1.0.2.74 — fixed in 1.0.2.74
NETGEAR R9000 Firmware: before 1.0.5.2 — fixed in 1.0.5.2
NETGEAR Xr500 Firmware: before 2.3.2.66 — fixed in 2.3.2.66

How to fix

Upgrade to a fixed version: NETGEAR R7800 Firmware 1.0.2.74; NETGEAR R9000 Firmware 1.0.5.2; NETGEAR Xr500 Firmware 2.3.2.66. Check the vendor advisory for mitigations.

References

https://kb.netgear.com/000064449/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Routers-PSV-2019-0203
https://kb.netgear.com/000064449/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Routers-PSV-2019-0203

Get alerted when CVE-2021-45623 or the next vulnerability affects your stack