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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "1.0.0.1"}}], "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": "2026-04-06T01:20:49.492751+00:00", "value": {"mitigation_remediation": ["Obtain and install the latest firmware update for the Tenda CH22 from the vendor\u2019s official website.", "If a critical patch is not yet available, block external access to the /goform/CertLocalPrecreate endpoint using a firewall or router ACLs.", "Verify that the router\u2019s firmware is no longer the vulnerable 1.0.0.1 version and that the web management interface is protected with a strong password.", "Monitor network traffic for suspicious activity to the /goform/CertLocalPrecreate path and set alerts for outbound connections from the device."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "This issue affects the Tenda CH22 router running firmware version 1.0.0.1. The vulnerability resides in the Parameter Handler component\u2019s web interface, exposed through the /goform/CertLocalPrecreate URI. No other firmware releases are listed as impacted.", "description_and_impact": "The vulnerability is a stack-based buffer overflow in the formCertLocalPrecreate function of the Parameter Handler module in Tenda CH22 firmware. By manipulating the standard argument of the /goform/CertLocalPrecreate endpoint, an attacker can trigger the overrun and achieve arbitrary code execution on the device. The flaw permits remote exploitation, allowing a threat actor to target the router from outside the local network without authentication.", "risk_and_exploitability": "The CVSS base score of 8.7 indicates high severity. The exploit has been publicly released and may be used by attackers, though the EPSS score is not available and the vulnerability is not currently listed in CISA\u2019s KEV catalog. Exploitation requires network connectivity to the device\u2019s web management interface; once the buffer overflow is triggered, an attacker can execute arbitrary code with system privileges on the router."}}}}, "created": "2026-04-06T20:22:12.790992+00:00", "updated": "2026-04-06T21:48:03.824455+00:00", "vendors": ["tenda", "tenda$PRODUCT$ch22"]}