CVE-2020-21937Public exploitNetwork attack vector

Arbitrary command execution via unsanitized Wi-Fi password

Published Jul 21, 2021 · Updated Aug 4, 2024

Command injection in Motorola CX2 router firmware 1.0.2 Build 20190508 Rel.97360n allows remote attackers to execute system commands. In repeater mode, HNAP1/SetWLanApcliSettings concatenates the supplied wireless password into a /bin/sh -c iwpriv command without neutralizing shell metacharacters. Network access to the router's HNAP interface and repeater mode are required, and successful injection grants command execution with the router process's privileges.

CVSS severity9.8
Critical
EPSS probability4.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Motorola CX2 router firmware 1.0.2 Build 20190508 Rel.97360n allows remote attackers to execute system commands. In repeater mode, HNAP1/SetWLanApcliSettings concatenates the supplied wireless password into a /bin/sh -c iwpriv command without neutralizing shell metacharacters. Network access to the router's HNAP interface and repeater mode are required, and successful injection grants command execution with the router process's privileges.

The record

CVE
CVE-2020-21937
Published
Jul 21, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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