How severe is CVE-2020-21937?

CVE-2020-21937 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-21937 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-21937?

CVE-2020-21937 affects Motorola Cx2 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-21937?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-21937 published?

CVE-2020-21937 was published on 2021-07-21 and last updated on 2026-06-17.

CVE-2020-21937

CVE-2020-21937 is a critical-severity vulnerability in Motorola Cx2 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Motorola Cx2 Firmware
Published: 2021-07-21
Last modified: 2026-06-17

Description

An command injection vulnerability in HNAP1/SetWLanApcliSettings of Motorola CX2 router CX 1.0.2 Build 20190508 Rel.97360n allows attackers to execute arbitrary system commands.

Frequently asked questions

What is CVE-2020-21937?: An command injection vulnerability in HNAP1/SetWLanApcliSettings of Motorola CX2 router CX 1.0.2 Build 20190508 Rel.97360n allows attackers to execute arbitrary system commands.
How severe is CVE-2020-21937?: CVE-2020-21937 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-21937 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-21937?: CVE-2020-21937 affects Motorola Cx2 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-21937?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-21937 published?: CVE-2020-21937 was published on 2021-07-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:motorola:cx2_firmware:1.0.2:build_20190508:*:*:*:*:*:*

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