CVE-2020-26557

Name: CVE-2020-26557
Creator: NVD / NIST
Published: 2021-05-24T18:15:07.903+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.83%

Last modified Jun 17, 2026

CVE-2020-26557 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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).. EPSS estimates a 0.83% chance of exploitation in the next 30 days.

Description

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).

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.83%

52.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Bluetooth	Mesh Profile	1.0.0
Bluetooth	Mesh Profile	1.0.1

References

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

Timeline

Published: May 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26557?

How severe is CVE-2020-26557?

CVE-2020-26557 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.83% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26557?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-26557?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST