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{"analysis": {"en": {"generated_at": "2026-04-18T20:14:26.045046+00:00", "value": {"mitigation_remediation": ["Update the router to the latest Totolink firmware that addresses the setWiFiEasyGuestCfg buffer overflow.", "If a patch is not yet available, block remote access to the admin interface and prevent external use of the /cgi-bin/cstecgi.cgi endpoint by disabling or restricting the URL at the web server or firewall level.", "Deploy firewall rules to rate\u2011limit or filter traffic destined for the /cgi-bin/cstecgi.cgi path and monitor device logs for abnormal ssid parameter activity."], "summary": {"action": "Apply Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Totolink LR350 routers operating with firmware 9.3.5u.6369_B20220309. No other vendors or product variants are listed in the available data.", "description_and_impact": "The flaw lies in the setWiFiEasyGuestCfg routine of /cgi-bin/cstecgi.cgi, where user-supplied ssid data is copied into a fixed\u2011size buffer without proper bounds checking. This stack\u2011based overflow can be triggered by a specially crafted ssid value sent from a remote host, and the publicly available exploit demonstrates that an attacker can potentially execute arbitrary code or crash the device, leading to loss of confidentiality, integrity or availability.", "risk_and_exploitability": "With a CVSS score of 8.7 the flaw is high severity, and the EPSS score of less than 1% suggests that exploitation is not yet widespread. The vulnerability is not currently catalogued in the CISA KEV list, but the public exploit code indicates that a remote attacker can target the /cgi-bin/cstecgi.cgi endpoint to trigger the overflow and potentially gain remote code execution on the device."}}}}, "created": "2026-01-20T08:43:37.005954+00:00", "updated": "2026-04-18T20:15:09.552535+00:00", "vendors": ["totolink", "totolink$PRODUCT$lr350"]}