Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may permit a nearby man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication procedure) by reflection of the public key and the authentication evidence of the initiating device, potentially permitting this attacker to complete authenticated pairing with the responding device using the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit at a time.
History

Tue, 04 Nov 2025 20:30:00 +0000

Type Values Removed Values Added
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-05-24T17:22:16.000Z

Updated: 2025-11-04T19:12:18.753Z

Reserved: 2020-10-04T00:00:00.000Z

Link: CVE-2020-26558

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-05-24T18:15:07.930

Modified: 2025-11-04T20:15:58.053

Link: CVE-2020-26558

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-05-24T16:00:00Z

Links: CVE-2020-26558 - Bugzilla