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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "1.0.0.3"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "F453", "source": "cna", "vendor": "Tenda"}, "product": "f453", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-04-03T00:51:30.371839+00:00", "value": {"mitigation_remediation": ["Check the Tenda support website and download the latest firmware revision that addresses the buffer overflow.", "Follow Tenda\u2019s firmware update instructions to install the new version.", "Reboot the device and confirm the firmware version matches the patched release.", "If a firmware update is not yet available, disable or restrict remote access to the router\u2019s web management interface.", "Continuously monitor the device\u2019s logs for any abnormal activity related to the VirtualSer endpoint."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Devices affected are Tenda F453 routers running firmware version 1.0.0.3. The flaw resides in the Parameters Handler component exposed via the web administration interface, and any router that has not yet received an updated firmware will remain vulnerable.", "description_and_impact": "A stack-based buffer overflow flaw has been found in the fromVirtualSer function of the VirtualSer component within the Tenda F453 firmware 1.0.0.3. The vulnerability is rooted in improper handling of user\u2011supplied input, which violates both the buffer overflow (CWE\u2011119) and stack-based buffer overflow (CWE\u2011121) criteria, allowing an attacker to corrupt the stack and potentially execute arbitrary code with the privileges of the vulnerable process.", "risk_and_exploitability": "The vulnerability carries a high CVSS score of 8.7, and current exploit probability is reported as less than 1%. It is not listed in the CISA Known Exploited Vulnerabilities catalog, but the exploit is publicly disclosed and can be triggered remotely by sending a specially crafted request to the VirtualSer endpoint. Successful exploitation would compromise the device\u2019s confidentiality, integrity, and availability."}}}}, "created": "2026-03-23T09:45:59.014129+00:00", "updated": "2026-04-03T09:39:14.103688+00:00", "vendors": ["tenda", "tenda$PRODUCT$f453"]}