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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": "2026-04-10T02:52:13.630308+00:00", "value": {"mitigation_remediation": ["Install the latest firmware update from Totolink that resolves the setAdvancedInfoShow command injection flaw.", "If a firmware update is unavailable, block external access to the /cgi-bin/cstecgi.cgi endpoint or place the router in a segregated network segment.", "Continuously monitor device logs for abnormal traffic or unexpected use of the tty_server parameter to detect potential exploitation attempts."], "summary": {"action": "Apply Patch", "impact": "Remote Command Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability targets the Totolink A7100RU model running firmware version 7.4cu.2313_b20191024. No other firmware revisions are listed in the data as affected.", "description_and_impact": "An OS command injection flaw exists in the setAdvancedInfoShow function of /cgi-bin/cstecgi.cgi on the Totolink A7100RU router. The tty_server argument is not validated, permitting an attacker to embed arbitrary shell commands that are executed by the device. This vulnerability is captured by CWE-77 and CWE-78 and allows the attacker to compromise confidentiality, integrity, and availability of the device by running malicious code on its underlying operating system.", "risk_and_exploitability": "The flaw carries a CVSS score of 9.3, indicating critical severity. EPSS is not provided, and the vulnerability is not in CISA's KEV catalog, but it has been publicly disclosed and can be triggered from over the network. Based on the description, the attacker can send a specially crafted HTTP request to the router to invoke the vulnerable CGI script; therefore, the likely attack vector is remote network access to the device."}}}}, "created": "2026-04-10T08:36:17.874432+00:00", "updated": "2026-04-10T09:27:17.582100+00:00", "vendors": ["totolink", "totolink$PRODUCT$a7100ru"]}