What is CVE-2020-21935?

CVE-2020-21935 is a critical-severity vulnerability in Motorola Cx2, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-07-21.

How severe is CVE-2020-21935?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Motorola Cx2

CVE-2020-21935

A command injection vulnerability in HNAP1/GetNetworkTomographySettings of Motorola CX2 router CX 1.0.2 Build 20190508 Rel.97360n allows attackers to execute arbitrary code.

Vulnerability class: Command Injection (OS Command Injection)

Published 2021-07-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.044 (90.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.044 · newest: 0.044 · change: 0.000

Affected products

Motorola Cx2
Motorola Cx2 Firmware — versions 1.0.2

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

github.com/cc-crack/router/blob/master/motocx2.md (Exploit, Third Party Advisory)
l0n0l.xyz/post/motocx2/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-21935?: CVE-2020-21935 is a critical-severity vulnerability in Motorola Cx2, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-07-21.
How severe is CVE-2020-21935?: Critical severity. CVSS v3 base score is 9.8 out of 10.