Vulnerability Monitor

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CVE-2020-26558

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 4.2, indicating it requires adjacent network access but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, limited integrity, for affected systems. Impacting 34 products from bluetooth, from fedoraproject, from debian and 31 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-05-24T18:15:07.930

Last Modified

2025-11-04T20:15:58.053

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 4.2 (MEDIUM)

CVSSv2 Vector

AV:A/AC:M/Au:N/C:P/I:P/A:N

  • Access Vector: ADJACENT_NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: NONE
Exploitability Score

5.5

Impact Score

4.9

Weaknesses
  • Type: Primary
    CWE-287
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application bluetooth bluetooth_core_specification ≤ 5.2 Yes
Operating System fedoraproject fedora 34 Yes
Operating System debian debian_linux 9.0 Yes
Operating System linux linux_kernel < 5.13 Yes
Operating System intel ax210_firmware - Yes
Hardware intel ax210 - No
Operating System intel ax201_firmware - Yes
Hardware intel ax201 - No
Operating System intel ax200_firmware - Yes
Hardware intel ax200 - No
Operating System intel ac_9560_firmware - Yes
Hardware intel ac_9560 - No
Operating System intel ac_9462_firmware - Yes
Hardware intel ac_9462 - No
Operating System intel ac_9461_firmware - Yes
Hardware intel ac_9461 - No
Operating System intel ac_9260_firmware - Yes
Hardware intel ac_9260 - No
Operating System intel ac_8265_firmware - Yes
Hardware intel ac_8265 - No
Operating System intel ac_8260_firmware - Yes
Hardware intel ac_8260 - No
Operating System intel ac_3168_firmware - Yes
Hardware intel ac_3168 - No
Operating System intel ac_7265_firmware - Yes
Hardware intel ac_7265 - No
Operating System intel ac_3165_firmware - Yes
Hardware intel ac_3165 - No
Operating System intel ax1675_firmware - Yes
Hardware intel ax1675 - No
Operating System intel ax1650_firmware - Yes
Hardware intel ax1650 - No
Operating System intel ac_1550_firmware - Yes
Hardware intel ac_1550 - No
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For bluetooth's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.