CVE-2020-26556: Bluetooth Core Specification

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device, able to conduct a successful brute-force attack on an insufficiently random AuthValue before the provisioning procedure times out, to complete authentication by leveraging Malleable Commitment.

Affected products

• Bluetooth Bluetooth Core Specification: from 1.0b, up to and including 5.2
• Bluetooth Mesh Profile: version 1.0.0 only; version 1.0.1 only

Published 2021-05-24. Last modified 2026-06-17.