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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "1.0.0.5"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "F456", "source": "cna", "vendor": "Tenda"}, "product": "f456", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-04-28T04:53:08.503730+00:00", "value": {"mitigation_remediation": ["Update the router firmware to a version that fixes the AdvSetWan buffer overflow or any vendor\u2011supplied security patch.", "Implement network segmentation or firewall rules to restrict access to the router\u2019s web management interface, limiting exposure to trusted local networks.", "Monitor traffic to the /goform/AdvSetWan endpoint for abnormal request patterns and log any suspicious activity for further investigation."], "summary": {"action": "Patch ASAP", "impact": "Remote Buffer Overflow"}, "threat_synthesis": {"affected_systems": "Products affected are the Tenda F456 router running firmware version 1.0.0.5. No other affected firmware or products are listed.", "description_and_impact": "The vulnerability resides in the httpd component of the Tenda F456 router, specifically the fromAdvSetWan function exposed via /goform/AdvSetWan. By manipulating the wanmode argument an attacker can trigger a buffer overflow, potentially enabling arbitrary code execution or denial of service. The weakness is identified by CWE\u2011119 and CWE\u2011120 and represents a serious integrity compromise if successful.", "risk_and_exploitability": "This flaw has a CVSS score of 8.7, indicating high severity. The EPSS score is reported as less than 1%, suggesting a very low probability of exploitation at the time of analysis, but the exploit has been made publicly available, so the risk is non\u2011negligible. The vulnerability is not listed in CISA\u2019s KEV catalog. The likely attack vector is remote, via an HTTP request to the vulnerable endpoint. An attacker with network access to the device\u2019s web interface could craft a payload that abuses the buffer overflow to gain unauthorized control."}}}}, "created": "2026-04-27T18:41:59.088331+00:00", "updated": "2026-04-28T05:00:14.745400+00:00", "vendors": ["tenda", "tenda$PRODUCT$f456"]}