CVE-2026-5850: OS Command Injection in Totolink A7100RU
CVE-2026-5850 is a critical OS command injection vulnerability in the Totolink A7100RU router firmware version 7. 4cu. 2313_b20191024. It affects the setVpnPassCfg function in the /cgi-bin/cstecgi. cgi CGI handler component. The vulnerability arises from improper handling of the pptpPassThru argument, allowing remote attackers to execute arbitrary OS commands without authentication. Although an exploit is publicly available, there is no confirmed patch or official remediation at this time.
AI Analysis
Technical Summary
This vulnerability in Totolink A7100RU firmware 7.4cu.2313_b20191024 allows remote OS command injection via the pptpPassThru parameter in the setVpnPassCfg function of the /cgi-bin/cstecgi.cgi CGI handler. The flaw enables unauthenticated attackers to execute arbitrary commands on the device's operating system. The CVSS 4.0 score is 9.3, indicating critical severity with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary OS commands on the affected device, potentially leading to full compromise of the router. This can result in unauthorized control, data exposure, or disruption of network services. The vulnerability is critical due to its remote, unauthenticated nature and high impact on system security.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting access to the device's management interface from untrusted networks and disabling vulnerable services if possible. Monitor vendor channels for updates and apply patches promptly once available.
CVE-2026-5850: OS Command Injection in Totolink A7100RU
Description
CVE-2026-5850 is a critical OS command injection vulnerability in the Totolink A7100RU router firmware version 7. 4cu. 2313_b20191024. It affects the setVpnPassCfg function in the /cgi-bin/cstecgi. cgi CGI handler component. The vulnerability arises from improper handling of the pptpPassThru argument, allowing remote attackers to execute arbitrary OS commands without authentication. Although an exploit is publicly available, there is no confirmed patch or official remediation at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Totolink A7100RU firmware 7.4cu.2313_b20191024 allows remote OS command injection via the pptpPassThru parameter in the setVpnPassCfg function of the /cgi-bin/cstecgi.cgi CGI handler. The flaw enables unauthenticated attackers to execute arbitrary commands on the device's operating system. The CVSS 4.0 score is 9.3, indicating critical severity with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary OS commands on the affected device, potentially leading to full compromise of the router. This can result in unauthorized control, data exposure, or disruption of network services. The vulnerability is critical due to its remote, unauthenticated nature and high impact on system security.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting access to the device's management interface from untrusted networks and disabling vulnerable services if possible. Monitor vendor channels for updates and apply patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-08T19:19:52.962Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d745461cc7ad14da533b21
Added to database: 4/9/2026, 6:20:54 AM
Last enriched: 4/9/2026, 6:35:52 AM
Last updated: 4/9/2026, 8:37:14 AM
Views: 6
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