CVE-2026-47773
HighCVSS 7.2Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
ArduinoBLE versions prior to 2.0.2 contain a missing bounds check in the ATT layer write request handler that allows a remote, unauthenticated BLE client to corrupt memory in the ATTClass global object. Devices running ArduinoBLE with one or more characteristics configured with the BLEEncryption property are affected.
Risk Assessment
An attacker within Bluetooth range can corrupt device memory, potentially leading to a crash or arbitrary code execution. This may disrupt device operation and compromise security.
Recommendation
Update ArduinoBLE to version 2.0.2 or later. Until patched, limit exposure of BLE devices and monitor for unusual connection activity.
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Original NVD description (English source)
ArduinoBLE enables Bluetooth Low Energy connectivity on certain Arduino models. Versions prior to 2.0.2 contain a missing bounds check in the ATT layer write request handler that allows a remote, unauthenticated BLE client to corrupt memory in the ATTClass global object. Devices running ArduinoBLE with one or more characteristics configured with the BLEEncryption property are affected. The fix is included starting from the 2.0.2 release.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

