Description
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.
Published: 2021-05-24
Score: 4.2 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2689-1 linux security update
Debian DLA Debian DLA DLA-2690-1 linux-4.19 security update
Debian DLA Debian DLA DLA-2692-1 bluez security update
Debian DSA Debian DSA DSA-4951-1 bluez security update
EUVD EUVD EUVD-2020-19103 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.
Ubuntu USN Ubuntu USN USN-4989-1 BlueZ vulnerabilities
Ubuntu USN Ubuntu USN USN-4989-2 BlueZ vulnerabilities
Ubuntu USN Ubuntu USN USN-5017-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5018-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5046-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5050-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5299-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5343-1 Linux kernel vulnerabilities
History

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

Type Values Removed Values Added
References

Subscriptions

Bluetooth Bluetooth Core Specification
Debian Debian Linux
Fedoraproject Fedora
Intel Ac 1550 Ac 1550 Firmware Ac 3165 Ac 3165 Firmware Ac 3168 Ac 3168 Firmware Ac 7265 Ac 7265 Firmware Ac 8260 Ac 8260 Firmware Ac 8265 Ac 8265 Firmware Ac 9260 Ac 9260 Firmware Ac 9461 Ac 9461 Firmware Ac 9462 Ac 9462 Firmware Ac 9560 Ac 9560 Firmware Ax1650 Ax1650 Firmware Ax1675 Ax1675 Firmware Ax200 Ax200 Firmware Ax201 Ax201 Firmware Ax210 Ax210 Firmware
Linux Linux Kernel
Redhat Enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

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

cve-icon OpenCVE Enrichment

No data.

Weaknesses