CVE-2022-26189Public exploitNetwork attack vector

Unauthenticated command execution via langType injection

Published Mar 22, 2022 · Updated Aug 3, 2024

Command injection in TOTOLINK N600R firmware 4.3.0cu.7570_B20200620 allows remote attackers to execute commands through the login interface. The setting/setLanguageCfg handler accepts a langType JSON value containing shell metacharacters in a POST to /cgi-bin/cstecgi.cgi without neutralizing the injected command. No authentication or user interaction is required, and injected commands execute with the router service's privileges.

CVSS severity9.8
Critical
EPSS probability3.42%
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 TOTOLINK N600R firmware 4.3.0cu.7570_B20200620 allows remote attackers to execute commands through the login interface. The setting/setLanguageCfg handler accepts a langType JSON value containing shell metacharacters in a POST to /cgi-bin/cstecgi.cgi without neutralizing the injected command. No authentication or user interaction is required, and injected commands execute with the router service's privileges.

The record

CVE
CVE-2022-26189
Published
Mar 22, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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
7.5NIST NVDAV:N/AC:L/Au:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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