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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "1.0.0.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "1.If"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "CH22", "source": "cna", "vendor": "Tenda"}, "product": "ch22", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-03-31T06:22:58.691687+00:00", "value": {"mitigation_remediation": ["Update the router firmware to a version that fixes the overflow vulnerability.", "If no update is immediately available, block external access to the /goform/setcfm interface using firewall rules or router ACLs.", "Monitor the router for abnormal traffic or errors on the /goform/setcfm endpoint and investigate any suspicious activity promptly."], "summary": {"action": "Apply Patch", "impact": "Remote Exploitation"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Tenda CH22 routers running firmware 1.0.0.1 or 1.If. Any device without an update to a newer firmware release is vulnerable.", "description_and_impact": "A stack\u2011based buffer overflow exists in the fromSetCfm function of Tenda CH22 firmware version 1.0.0.1 and 1.If. By manipulating the funcname argument sent to the /goform/setcfm endpoint, an attacker can overflow a stack buffer and potentially execute arbitrary code. This flaw enables a full compromise of the device, providing the attacker with unrestricted access to the router and any connected network.", "risk_and_exploitability": "The CVSS score of 8.7 indicates high severity, and the flaw is not listed in the CISA KEV catalog. EPSS information is not available, but the flaw is publicly disclosed and can be exploited remotely. The likely attack vector is an unauthenticated HTTP request to the /goform/setcfm endpoint; attackers can trigger the overflow from any network point that can reach the router. Successful exploitation could lead to arbitrary code execution, device takeover, and lateral movement within the network."}}}}, "created": "2026-03-31T19:57:04.962415+00:00", "updated": "2026-03-31T20:39:49.490137+00:00", "vendors": ["tenda", "tenda$PRODUCT$ch22"]}