CVE-2026-9386: OS Command Injection in Totolink A8000RU
CVE-2026-9386 is a critical OS command injection vulnerability in the Totolink A8000RU router, specifically in the setLanguageCfg function of the /cgi-bin/cstecgi. cgi file within the Web Management Interface. The vulnerability arises from improper handling of the 'lang' argument, allowing remote attackers to execute arbitrary OS commands. The affected version is 7. 1cu. 643_b20200521. There is no official patch or remediation level provided yet, and while the exploit is publicly available, there are no known exploits observed in the wild at this time.
AI Analysis
Technical Summary
This vulnerability affects the Totolink A8000RU router's Web Management Interface, where the setLanguageCfg function in /cgi-bin/cstecgi.cgi improperly sanitizes the 'lang' parameter. This flaw allows remote attackers to perform OS command injection, potentially leading to full system compromise. The CVSS 4.0 base score is 9.3, indicating critical severity with network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. The affected firmware version is 7.1cu.643_b20200521. No official patch or vendor advisory is currently available, and the device is not a cloud service.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary operating system commands on the affected device without authentication, potentially leading to full compromise of the router, including control over network traffic and device configuration. This can severely impact 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, restrict access to the Web Management Interface from untrusted networks and consider disabling remote management features if possible to reduce exposure.
CVE-2026-9386: OS Command Injection in Totolink A8000RU
Description
CVE-2026-9386 is a critical OS command injection vulnerability in the Totolink A8000RU router, specifically in the setLanguageCfg function of the /cgi-bin/cstecgi. cgi file within the Web Management Interface. The vulnerability arises from improper handling of the 'lang' argument, allowing remote attackers to execute arbitrary OS commands. The affected version is 7. 1cu. 643_b20200521. There is no official patch or remediation level provided yet, and while the exploit is publicly available, there are no known exploits observed in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the Totolink A8000RU router's Web Management Interface, where the setLanguageCfg function in /cgi-bin/cstecgi.cgi improperly sanitizes the 'lang' parameter. This flaw allows remote attackers to perform OS command injection, potentially leading to full system compromise. The CVSS 4.0 base score is 9.3, indicating critical severity with network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. The affected firmware version is 7.1cu.643_b20200521. No official patch or vendor advisory is currently available, and the device is not a cloud service.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary operating system commands on the affected device without authentication, potentially leading to full compromise of the router, including control over network traffic and device configuration. This can severely impact 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, restrict access to the Web Management Interface from untrusted networks and consider disabling remote management features if possible to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-23T15:03:11.043Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a130bc909f6977edb6e6083
Added to database: 5/24/2026, 2:31:37 PM
Last enriched: 5/24/2026, 2:46:38 PM
Last updated: 5/24/2026, 3:49:09 PM
Views: 3
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