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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.1cu.643_b20200521"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "A8000RU", "source": "cna", "vendor": "Totolink"}, "product": "a8000ru", "vendor": "totolink"}], "analysis": {"en": {"generated_at": "2026-04-28T04:17:17.315418+00:00", "value": {"mitigation_remediation": ["Update the router to the latest firmware release that addresses the command injection flaw.", "If a rapid firmware update is not yet available, isolate the device by blocking external access to the /cgi-bin/cstecgi.cgi endpoint with a firewall or by disabling the web management interface entirely.", "Implement strict input validation and parameter sanitization in the router\u2019s CGI code to prevent future injection attempts based on CWE-77 and CWE-78."], "summary": {"action": "Apply patch", "impact": "Remote code execution"}, "threat_synthesis": {"affected_systems": "The flaw affects Totolink A8000RU routers running firmware version 7.1cu.643_b20200521. No other versions or product variants have been documented as impacted.", "description_and_impact": "The vulnerability resides in the setWiFiAclRules function of the /cgi-bin/cstecgi.cgi CGI handler. Manipulation of the \"mode\" argument allows an attacker to inject arbitrary operating\u2011system commands, leading to full remote code execution on the affected router. This flaw can compromise network confidentiality, integrity, and availability if exploited, as it gives the attacker control over the device and the Ability to alter its configuration or use it as a foothold into the local network.", "risk_and_exploitability": "The CVSS score of 9.3 indicates a critical severity. Although an EPSS score is not available, the vulnerability is actively exploited as the exploit has been publicly released, and the document notes that the attack can be carried out remotely. Because the flaw is exposed through a publicly reachable CGI endpoint and no authentication is required for the vulnerable parameter, any remote host with network access to the router can potentially trigger command injection and take full control of the device. The absence of a KEV listing does not diminish the risk, as exploitation is already demonstrated in the wild."}}}}, "created": "2026-04-28T02:30:18.596840+00:00", "updated": "2026-04-28T04:30:21.139843+00:00", "vendors": ["totolink", "totolink$PRODUCT$a8000ru"]}