CVE-2026-47773

ArduinoBLE: Memory corruption via malformed ATT write request

State: Published
Severity: 7.2 High
Published: Sep 11, 2026
Updated: Sep 15, 2026
Reserved: May 19, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	7.2 High	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-131 Incorrect Calculation of Buffer Size
CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
ArduinoBLEarduino-libraries	< 2.0.2Affected

References

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