CVE-2020-26556 describes a vulnerability in the Mesh Provisioning process of Bluetooth Mesh profile versions 1.0 and 1.0.1. A nearby attacker can exploit Malleable Commitment to brute-force an insufficiently random AuthValue, thereby completing authentication before the provisioning timeout. This is a high-severity vulnerability (CVSS 7.5) with an adjacent attack vector and high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been confirmed, the vulnerability has garnered some community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.0b, <= 5.2CPE matchmatch criteria | cpe:2.3:a:bluetooth:bluetooth_core_specification:*:*:*:*:*:*:*:* | ||
1.0.0CPE matchmatch criteria | cpe:2.3:a:bluetooth:mesh_profile:1.0.0:*:*:*:*:*:*:* | ||
1.0.1CPE matchmatch criteria | cpe:2.3:a:bluetooth:mesh_profile:1.0.1:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.