CVE-2026-9458: OS Command Injection in Totolink A8000RU
A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. The impacted element is the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument enabled leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might be used.
AI Analysis
Technical Summary
The Totolink A8000RU router version 7.1cu.643_b20200521 contains an OS command injection vulnerability in the setWanCfg function of the /cgi-bin/cstecgi.cgi component of its Web Management Interface. This vulnerability allows unauthenticated remote attackers to execute arbitrary OS commands by manipulating the input arguments passed to this function. The vulnerability has a CVSS 4.0 base 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. No vendor advisory or patch information is currently available, and the exploit code is publicly accessible.
Potential Impact
Successful exploitation of this vulnerability allows remote attackers to execute arbitrary operating system commands on the affected device without authentication. This can lead to full compromise of the router, including unauthorized access, data manipulation, and disruption of network services. The critical CVSS score reflects the high potential impact on confidentiality, integrity, and availability of the device and connected network.
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 Web Management Interface from untrusted networks, disable remote management if possible, and monitor for any unusual activity. Avoid exposing the device management interface to the internet. Follow updates from Totolink for any forthcoming patches or official mitigations.
CVE-2026-9458: OS Command Injection in Totolink A8000RU
Description
A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. The impacted element is the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument enabled leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might be used.
CVSS v4.0
Score 9.3critical
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Totolink A8000RU router version 7.1cu.643_b20200521 contains an OS command injection vulnerability in the setWanCfg function of the /cgi-bin/cstecgi.cgi component of its Web Management Interface. This vulnerability allows unauthenticated remote attackers to execute arbitrary OS commands by manipulating the input arguments passed to this function. The vulnerability has a CVSS 4.0 base 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. No vendor advisory or patch information is currently available, and the exploit code is publicly accessible.
Potential Impact
Successful exploitation of this vulnerability allows remote attackers to execute arbitrary operating system commands on the affected device without authentication. This can lead to full compromise of the router, including unauthorized access, data manipulation, and disruption of network services. The critical CVSS score reflects the high potential impact on confidentiality, integrity, and availability of the device and connected network.
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 Web Management Interface from untrusted networks, disable remote management if possible, and monitor for any unusual activity. Avoid exposing the device management interface to the internet. Follow updates from Totolink for any forthcoming patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-24T07:57:28.742Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a145147a5ae1af1aaa32f76
Added to database: 05/25/2026, 13:40:23 UTC
Last enriched: 06/01/2026, 20:21:53 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 71
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