CVE-2022-43973Public exploitNetwork attack vector

Root command execution via unvalidated Check_TSSI input

Published Jan 9, 2023 · Updated Apr 9, 2025

OS command injection in Linksys WRT54GL firmware 4.30.18.006 and earlier allows remote authenticated users to execute commands as root. The Check_TSSI function in the httpd binary inserts unvalidated request input into a system command. Administrator authentication and a crafted POST request to /apply.cgi are required, after which the command runs on the embedded Linux system as root.

CVSS severity7.2
High
EPSS probability1.85%
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 Linksys WRT54GL firmware 4.30.18.006 and earlier allows remote authenticated users to execute commands as root. The Check_TSSI function in the httpd binary inserts unvalidated request input into a system command. Administrator authentication and a crafted POST request to /apply.cgi are required, after which the command runs on the embedded Linux system as root.

The record

CVE
CVE-2022-43973
Published
Jan 9, 2023
Updated
Apr 9, 2025
Vendor
Linksys
Product
WRT54GL Wireless-G Broadband Router
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2025Record 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Firmware <=4.30.18.006

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Linksys · WRT54GL Wireless-G Broadband Routerversion=Firmware <=4.30.18.006

Published CVSS scores

7.2TrellixCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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
Privilegesadmin
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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