Cyber Resilience

CVE-2021-20173

HighPublic PoCRCE

Published: 30 December 2021

Published
30 December 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.1154 93.8th percentile
Risk Priority 25 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-20173 is a high-severity OS Command Injection (CWE-78) vulnerability in Netgear R6700 Firmware. Its CVSS base score is 8.8 (High).

Operationally, ranked in the top 6.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

Netgear Nighthawk R6700 version 1.0.4.120 contains a command injection vulnerability in update functionality of the device. By triggering a system update check via the SOAP interface, the device is susceptible to command injection via preconfigured values.

CWE(s)
CWE-78

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

netgear
r6700 firmware
1.0.4.120

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References