CVE-2026-7037: OS Command Injection in Totolink A8000RU
CVE-2026-7037 is a critical OS command injection vulnerability in the Totolink A8000RU router firmware version 7. 1cu. 643_b20200521. The flaw exists in the CGI Handler component, specifically in the setVpnPassCfg function within /cgi-bin/cstecgi. cgi. An attacker can remotely manipulate the pptpPassThru argument to execute arbitrary OS commands. The vulnerability has a high CVSS 4. 0 score of 9. 3, indicating it is remotely exploitable without authentication and can lead to significant impact. Although an exploit has been publicly released, there is no official patch or remediation guidance currently available from the vendor.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-7037) affects Totolink A8000RU routers running firmware 7.1cu.643_b20200521. It is an OS command injection flaw in the CGI Handler's setVpnPassCfg function, triggered by manipulation of the pptpPassThru parameter in the /cgi-bin/cstecgi.cgi endpoint. The vulnerability allows unauthenticated remote attackers to execute arbitrary operating system commands on the device. The CVSS 4.0 base score is 9.3, reflecting network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability. No official patch or vendor advisory with remediation details is currently available, and public exploit code exists.
Potential Impact
Successful exploitation enables remote attackers to execute arbitrary OS commands on the affected router without authentication. This can lead to full compromise of the device, including unauthorized access, control over network traffic, and potential pivoting to internal networks. The vulnerability severely impacts confidentiality, integrity, and availability of the device and connected networks.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider disabling remote management features if enabled, restrict network access to the device's management interface, and monitor for unusual activity. Avoid exposing the vulnerable CGI endpoint to untrusted networks. Follow updates from Totolink for an official patch or mitigation instructions.
CVE-2026-7037: OS Command Injection in Totolink A8000RU
Description
CVE-2026-7037 is a critical OS command injection vulnerability in the Totolink A8000RU router firmware version 7. 1cu. 643_b20200521. The flaw exists in the CGI Handler component, specifically in the setVpnPassCfg function within /cgi-bin/cstecgi. cgi. An attacker can remotely manipulate the pptpPassThru argument to execute arbitrary OS commands. The vulnerability has a high CVSS 4. 0 score of 9. 3, indicating it is remotely exploitable without authentication and can lead to significant impact. Although an exploit has been publicly released, there is no official patch or remediation guidance currently available from the vendor.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-7037) affects Totolink A8000RU routers running firmware 7.1cu.643_b20200521. It is an OS command injection flaw in the CGI Handler's setVpnPassCfg function, triggered by manipulation of the pptpPassThru parameter in the /cgi-bin/cstecgi.cgi endpoint. The vulnerability allows unauthenticated remote attackers to execute arbitrary operating system commands on the device. The CVSS 4.0 base score is 9.3, reflecting network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability. No official patch or vendor advisory with remediation details is currently available, and public exploit code exists.
Potential Impact
Successful exploitation enables remote attackers to execute arbitrary OS commands on the affected router without authentication. This can lead to full compromise of the device, including unauthorized access, control over network traffic, and potential pivoting to internal networks. The vulnerability severely impacts confidentiality, integrity, and availability of the device and connected networks.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider disabling remote management features if enabled, restrict network access to the device's management interface, and monitor for unusual activity. Avoid exposing the vulnerable CGI endpoint to untrusted networks. Follow updates from Totolink for an official patch or mitigation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-25T15:39:20.689Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69edffdb87115cfb6800b221
Added to database: 4/26/2026, 12:06:51 PM
Last enriched: 4/26/2026, 12:21:03 PM
Last updated: 4/26/2026, 2:33:50 PM
Views: 6
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