CVE-2026-7122: OS Command Injection in Totolink A8000RU
A vulnerability has been found in Totolink A8000RU 7.1cu.643_b20200521. This impacts the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument enable leads to os command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
AI Analysis
Technical Summary
This vulnerability affects the Totolink A8000RU router firmware 7.1cu.643_b20200521. It resides in the CGI handler component, specifically the setUPnPCfg function in /cgi-bin/cstecgi.cgi. An attacker can manipulate the 'enable' argument to perform OS command injection remotely without any privileges or user interaction. The CVSS 4.0 base score is 9.3, indicating critical severity with network attack vector, no required privileges, and high impact on confidentiality, integrity, and availability. No official fix or patch has been documented in the provided data.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary operating system commands on the affected device, potentially leading to full compromise of the router. This can impact confidentiality, integrity, and availability of the device and the network it serves. The vulnerability is critical due to its remote, unauthenticated nature and high impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, affected users should consider disabling UPnP functionality if possible or restrict access to the device's management interface from untrusted networks to reduce exposure.
CVE-2026-7122: OS Command Injection in Totolink A8000RU
Description
A vulnerability has been found in Totolink A8000RU 7.1cu.643_b20200521. This impacts the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument enable leads to os command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
CVSS v4.0
Score 9.3critical
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the Totolink A8000RU router firmware 7.1cu.643_b20200521. It resides in the CGI handler component, specifically the setUPnPCfg function in /cgi-bin/cstecgi.cgi. An attacker can manipulate the 'enable' argument to perform OS command injection remotely without any privileges or user interaction. The CVSS 4.0 base score is 9.3, indicating critical severity with network attack vector, no required privileges, and high impact on confidentiality, integrity, and availability. No official fix or patch has been documented in the provided data.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary operating system commands on the affected device, potentially leading to full compromise of the router. This can impact confidentiality, integrity, and availability of the device and the network it serves. The vulnerability is critical due to its remote, unauthenticated nature and high impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, affected users should consider disabling UPnP functionality if possible or restrict access to the device's management interface from untrusted networks to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-26T19:12:59.583Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69ef5358ba26a39fba215e9f
Added to database: 4/27/2026, 12:15:20 PM
Last enriched: 5/5/2026, 2:25:07 AM
Last updated: 6/11/2026, 6:28:52 PM
Views: 65
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