CVE-2026-9475: OS Command Injection in Totolink A8000RU
CVE-2026-9475 is a critical OS command injection vulnerability in the Totolink A8000RU router, specifically affecting version 7. 1cu. 643_b20200521. The flaw exists in the setIpQosRules function within the /cgi-bin/cstecgi. cgi Web Management Interface component. An attacker can remotely exploit this vulnerability by manipulating the Comment argument, leading to arbitrary OS command execution. The vulnerability has a high CVSS 4. 0 score of 9. 3, indicating critical severity. Although the exploit has been publicly disclosed, there are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability involves OS command injection in the Totolink A8000RU router's web management interface. The issue arises from improper sanitization of the Comment argument in the setIpQosRules function of /cgi-bin/cstecgi.cgi, allowing remote attackers to execute arbitrary operating system commands. The affected firmware version is 7.1cu.643_b20200521. The vulnerability is remotely exploitable without authentication or user interaction, as indicated by the CVSS vector. No vendor advisory or patch information is currently provided, and the remediation level is unknown.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary OS commands on the affected device, potentially leading to full control over the router. This could compromise network security, disrupt services, or enable further attacks within the network environment. The vulnerability is critical due to its remote, unauthenticated nature and the high potential impact on device integrity and confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, it is recommended to restrict access to the router's web management interface from untrusted networks and monitor for unusual activity. Avoid exposing the management interface to the internet. Follow up with Totolink for any forthcoming security updates or patches addressing this vulnerability.
CVE-2026-9475: OS Command Injection in Totolink A8000RU
Description
CVE-2026-9475 is a critical OS command injection vulnerability in the Totolink A8000RU router, specifically affecting version 7. 1cu. 643_b20200521. The flaw exists in the setIpQosRules function within the /cgi-bin/cstecgi. cgi Web Management Interface component. An attacker can remotely exploit this vulnerability by manipulating the Comment argument, leading to arbitrary OS command execution. The vulnerability has a high CVSS 4. 0 score of 9. 3, indicating critical severity. Although the exploit has been publicly disclosed, there are no known exploits in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves OS command injection in the Totolink A8000RU router's web management interface. The issue arises from improper sanitization of the Comment argument in the setIpQosRules function of /cgi-bin/cstecgi.cgi, allowing remote attackers to execute arbitrary operating system commands. The affected firmware version is 7.1cu.643_b20200521. The vulnerability is remotely exploitable without authentication or user interaction, as indicated by the CVSS vector. No vendor advisory or patch information is currently provided, and the remediation level is unknown.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary OS commands on the affected device, potentially leading to full control over the router. This could compromise network security, disrupt services, or enable further attacks within the network environment. The vulnerability is critical due to its remote, unauthenticated nature and the high potential impact on device integrity and confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, it is recommended to restrict access to the router's web management interface from untrusted networks and monitor for unusual activity. Avoid exposing the management interface to the internet. Follow up with Totolink for any forthcoming security updates or patches addressing this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-24T09:15:21.440Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1485eca5ae1af1aacc71c3
Added to database: 5/25/2026, 5:25:00 PM
Last enriched: 5/25/2026, 5:40:00 PM
Last updated: 5/25/2026, 6:25:32 PM
Views: 4
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