CVE-2026-7204: OS Command Injection in Totolink A8000RU
CVE-2026-7204 is a critical OS command injection vulnerability in the Totolink A8000RU router firmware version 7.1cu.643_b20200521. The flaw exists in the setPptpServerCfg function within the /cgi-bin/cstecgi.cgi CGI handler, where manipulation of the 'enable' argument allows remote attackers to execute arbitrary OS commands. The vulnerability can be exploited remotely without authentication and has been publicly disclosed. No official patch or remediation guidance has been provided yet by the vendor. The CVSS 4.0 base score is 9.3, reflecting the high impact and ease of exploitation.
AI Analysis
Technical Summary
This vulnerability affects the Totolink A8000RU router firmware version 7.1cu.643_b20200521. The issue is an OS command injection in the CGI handler component, specifically in the setPptpServerCfg function of the /cgi-bin/cstecgi.cgi file. By manipulating the 'enable' argument, an unauthenticated remote attacker can execute arbitrary operating system commands on the device. The vulnerability has a CVSS 4.0 score of 9.3, indicating critical severity with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability. The vulnerability has been publicly disclosed, but no official patch or remediation level has been announced by the vendor. The device is not a cloud service, so remediation depends on vendor firmware updates.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to execute arbitrary OS 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 critical CVSS score of 9.3 reflects the high severity and potential for significant operational disruption or unauthorized control.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level has been provided, users should monitor Totolink's official channels for firmware updates addressing this vulnerability. Until a patch is available, consider disabling the vulnerable service or restricting access to the device's management interface from untrusted networks if possible.
CVE-2026-7204: OS Command Injection in Totolink A8000RU
Description
CVE-2026-7204 is a critical OS command injection vulnerability in the Totolink A8000RU router firmware version 7.1cu.643_b20200521. The flaw exists in the setPptpServerCfg function within the /cgi-bin/cstecgi.cgi CGI handler, where manipulation of the 'enable' argument allows remote attackers to execute arbitrary OS commands. The vulnerability can be exploited remotely without authentication and has been publicly disclosed. No official patch or remediation guidance has been provided yet by the vendor. The CVSS 4.0 base score is 9.3, reflecting the high impact and ease of exploitation.
CVSS v4.0
Score 9.3critical
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the Totolink A8000RU router firmware version 7.1cu.643_b20200521. The issue is an OS command injection in the CGI handler component, specifically in the setPptpServerCfg function of the /cgi-bin/cstecgi.cgi file. By manipulating the 'enable' argument, an unauthenticated remote attacker can execute arbitrary operating system commands on the device. The vulnerability has a CVSS 4.0 score of 9.3, indicating critical severity with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability. The vulnerability has been publicly disclosed, but no official patch or remediation level has been announced by the vendor. The device is not a cloud service, so remediation depends on vendor firmware updates.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to execute arbitrary OS 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 critical CVSS score of 9.3 reflects the high severity and potential for significant operational disruption or unauthorized control.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level has been provided, users should monitor Totolink's official channels for firmware updates addressing this vulnerability. Until a patch is available, consider disabling the vulnerable service or restricting access to the device's management interface from untrusted networks if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-27T13:56:17.254Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f008add3d5ab910272842a
Added to database: 4/28/2026, 1:09:01 AM
Last enriched: 5/5/2026, 7:39:18 AM
Last updated: 6/12/2026, 5:18:11 AM
Views: 124
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