CVE-2020-26558 (GCVE-0-2020-26558)

Vulnerability from cvelistv5 – Published: 2021-05-24 17:22 – Updated: 2025-11-04 19:12
VLAI
Summary
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.
Severity
4.2 (Medium)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE
  • n/a
Assigner
References
Show details on NVD website
To clipboard 

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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T10:17:37+00:00",
      "cve": "CVE-2020-26558",
      "id": "CVE-2020-26558",
      "initial_release_date": "2020-01-01T00:00:00+00:00",
      "product_status:fixed": "171",
      "product_status:known_affected": "54",
      "product_status:known_not_affected": "164",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "bluez: Passkey Entry protocol of the Bluetooth Core is vulnerable to an impersonation attack",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-26558.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.