CVE-2020-26556

—

CVSS 3.1

7.5 high

EPSS

<1%p58

Published

May 24, 2021 (May 24, 2021)

Modified

Jun 17, 2026

Description

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.

Vendors: bluetooth
Products: bluetooth core specification, mesh profile
Weakness: CWE-307
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.9%)

In the news2 stories

New Bluetooth Flaws Let Attackers Impersonate Legitimate Devices

The Hacker NewsMay 28, 03:54 UTC · May 28, 2021Vulnerability CVE-2020-26555 CVE-2020-26558 CVE-2020-26556+3 CVEs

French intel found flaws in Bluetooth Core and Mesh specs

Security AffairsMay 24, 21:55 UTC · May 24, 2021Vulnerability CVE-2020-26559 CVE-2020-26556 CVE-2020-26557+3 CVEs