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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.4cu.2313_b20191024"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "A7100RU", "source": "cna", "vendor": "Totolink"}, "product": "a7100ru", "vendor": "totolink"}], "analysis": {"en": {"generated_at": "2026-04-13T02:50:28.637203+00:00", "value": {"mitigation_remediation": ["Upgrade the router to the latest firmware released by Totolink that fixes the cstecgi.cgi command injection.", "If an update is not available, restrict access to the /cgi-bin/cstecgi.cgi endpoint by whitelisting trusted IP addresses or applying firewall rules.", "If the firmware upload feature is not required, disable it through the router\u2019s configuration or isolate the device from untrusted networks."], "summary": {"action": "Immediate Patch", "impact": "Remote OS command injection enabling arbitrary code execution"}, "threat_synthesis": {"affected_systems": "Routers of the Totolink A7100RU series running firmware version 7.4cu.2313_b20191024 are affected. The flaw is located in the /cgi-bin/cstecgi.cgi file that processes firmware uploads.", "description_and_impact": "The vulnerability resides in the UploadFirmwareFile routine of the cstecgi.cgi CGI handler on the router\u2019s web interface. By manipulating the FileName argument, an attacker can inject operating\u2011system commands that are subsequently executed by the device\u2019s firmware. This flaw permits remote execution of arbitrary code, allowing a threat actor to compromise the router\u2019s confidentiality, integrity and availability.", "risk_and_exploitability": "The CVSS score of 9.3 indicates a high\u2011severity vulnerability. EPSS data is not available, but the public availability of an exploit and the lack of existing mitigations make the risk significant. The attack vector is remote, leveraging the publicly accessible web interface without authentication, so an adversary can trigger the vulnerability from an external network. If exploited, the attacker gains full control of the device."}}}}, "created": "2026-04-13T12:38:00.343104+00:00", "updated": "2026-04-13T12:53:48.053695+00:00", "vendors": ["totolink", "totolink$PRODUCT$a7100ru"]}