CVE-2026-47773
High
Description
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.
SeverityHigh
CVSS7.2
Exploit probability—
ProductArduinoBLE
PublishedSep 11, 2026
First seenSep 11, 2026
Weakness typeCWE-131CWE-131CWE-787Out-of-bounds write
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| arduino-libraries ArduinoBLE | < 2.0.2 | — |
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