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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "16.03.53.12"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "cx12l", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-04-07T02:01:34.847618+00:00", "value": {"mitigation_remediation": ["Update the router firmware to a release that removes the vulnerability (check the vendor website for a newer version of CX12L firmware).", "Restrict administrative access to the web interface using network segmentation or firewall rules so only trusted management hosts can reach port 80/443.", "Disable remote management features if they are not required. If the vendor has not released an update, temporarily block external access to the affected endpoint by configuring access control lists."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution via local network"}, "threat_synthesis": {"affected_systems": "The vulnerability was identified in the Tenda CX12L router running firmware version 16.03.53.12. No other product versions or vendors were listed as affected.", "description_and_impact": "A stack-based buffer overflow exists in the fromwebExcptypemanFilter function of the /goform/webExcptypemanFilter endpoint on the Tenda CX12L router. When a manipulated page parameter is supplied locally, the overflow corrupts the stack, permitting an attacker to execute arbitrary code with the privileges of the router\u2019s firmware. This can compromise confidentiality, integrity, and availability of the device and any devices on the local network.", "risk_and_exploitability": "The CVSS score of 8.6 indicates a high severity. While an EPSS score is not available, the flaw has been publicly disclosed and can be exploited by anyone with local network access. The vulnerability is not listed in the CISA KEV catalog, but the requirement for local access limits the attack surface to administrators or compromised devices on the network. The potential impact of arbitrary code execution makes prompt remediation essential."}}}}, "created": "2026-04-07T06:53:59.772803+00:00", "updated": "2026-04-07T09:36:58.396345+00:00", "vendors": ["tenda", "tenda$PRODUCT$cx12l"]}