Vulnerability record · CVE-2020-26557 · published 24 May 2021

CVE-2020-26557: Bluetooth mesh profile improper authentication vulnerability

Bluetooth · Mesh Profile

Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device (without possession of the AuthValue used in the provisioning protocol) to determine the AuthValue via a brute-force attack (unless the AuthValue is sufficiently random and changed each time).

7.5 CVSS 3.1 High EPSS 0.83% · top 44.2% CWE-287 · Improper authentication

7.5CVSS 3.1 base score, v2 2.9

0.83%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

5References

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Mesh Profile Bluetooth

References

Link	Tags
https://kb.cert.org/vuls/id/799380	Third Party AdvisoryUS Government Resource
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/	Vendor Advisory
https://kb.cert.org/vuls/id/799380	Third Party AdvisoryUS Government Resource
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/	Vendor Advisory
https://www.kb.cert.org/vuls/id/799380

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-26557), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.