CVE-2026-28520

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.2.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "arduino-TuyaOpen", "source": "cna", "vendor": "Tuya"}, "product": "arduino-tuyaopen", "vendor": "tuya"}], "analysis": {"en": {"generated_at": "2026-03-17T16:51:47.213370+00:00", "value": {"mitigation_remediation": ["Upgrade the arduino-TuyaOpen firmware to version 1.2.1 or newer.", "Configure devices to avoid automatic connection to unknown Wi-Fi networks or enforce network segmentation and use secure access points.", "Monitor for unauthorized Wi-Fi hotspot activity around the device and audit network logs for anomalous connections."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The affected product is arduino-TuyaOpen from Tuya. All firmware versions prior to 1.2.1 are vulnerable. No other versions are reported to be affected.", "description_and_impact": "The vulnerability is a single-byte buffer overflow in the WiFiMulti component of the arduino-TuyaOpen firmware before version 1.2.1. The flaw allows an attacker to overflow a local buffer and execute arbitrary code on the device, giving full control over the embedded hardware. The weakness is identified as CWE-193 and carries a high-severity CVSS score of 8.6, indicating substantial risk to device confidentiality, integrity, and availability.", "risk_and_exploitability": "The CVSS score of 8.6 denotes high severity, but the EPSS score of less than 1 % suggests a low current probability of exploitation. The vulnerability is not listed in the CISA KEV catalog. Exploitation requires the target device to connect to an attacker-controlled Wi-Fi access point. When a device associates with such a hotspot, the attacker can send a specially crafted packet that triggers the buffer overflow, enabling arbitrary code execution on the compromised device."}}}}, "created": "2026-03-16T09:21:37.786522+00:00", "updated": "2026-03-23T14:01:43.472348+00:00", "vendors": ["tuya", "tuya$PRODUCT$arduino-tuyaopen"]}