What’s Vulnerable › Vulnerabilities

CVE-2020-26556

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-24 · updated 2026-06-17
• Weakness: CWE-307

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.

Affected products

• Bluetooth Core Specification: from 1.0b through 5.2
• Bluetooth Mesh Profile: 1.0.0, 1.0.1

References

• https://kb.cert.org/vuls/id/799380
• https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/
• https://www.kb.cert.org/vuls/id/799380
• https://kb.cert.org/vuls/id/799380
• https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/
• https://www.kb.cert.org/vuls/id/799380

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