CVE-2021-43164Public exploitNetwork attack vector

Authenticated command execution via updateVersion injection

Published May 4, 2022 · Updated Jul 9, 2026

OS command injection in Ruijie RG-EW Series Routers through ReyeeOS 1.55.1915 allows remote authenticated users to execute commands. The updateVersion method in /usr/lib/lua/luci/modules/wireless.lua inserts the jsonparam value into an OS command without neutralizing shell metacharacters. Valid router credentials and network access to the LuCI API are required, after which injected commands execute on the router.

CVSS severity8.8
High
EPSS probability35.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Ruijie RG-EW Series Routers through ReyeeOS 1.55.1915 allows remote authenticated users to execute commands. The updateVersion method in /usr/lib/lua/luci/modules/wireless.lua inserts the jsonparam value into an OS command without neutralizing shell metacharacters. Valid router credentials and network access to the LuCI API are required, after which injected commands execute on the router.

The record

CVE
CVE-2021-43164
Published
May 4, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, CWE-77, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5National Vulnerability DatabaseAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

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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