Bluetooth Mesh 1.0.0/1.0.1 Public Key improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Bluetooth Mesh 1.0.0/1.0.1 and classified as critical. Affected is an unknown function of the component Public Key Handler. Such manipulation leads to improper authentication. This vulnerability is uniquely identified as CVE-2020-26559. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Bluetooth Mesh 1.0.0/1.0.1. Affected by this issue is an unknown code of the component Public Key Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality. CVE summarizes:

Bluetooth Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device (participating in the provisioning protocol) to identify the AuthValue used given the Provisioner’s public key, and the confirmation number and nonce provided by the provisioning device. This could permit a device without the AuthValue to complete provisioning without brute-forcing the AuthValue.

The weakness was disclosed 05/25/2021. The advisory is shared for download at kb.cert.org. This vulnerability is handled as CVE-2020-26559. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.9

VulDB Base Score: 3.1
VulDB Temp Score: 3.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/04/2020 🔍
05/25/2021 +233 days 🔍
05/25/2021 +0 days 🔍
11/04/2025 +1624 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Status: Confirmed

CVE: CVE-2020-26559 (🔍)
GCVE (CVE): GCVE-0-2020-26559
GCVE (VulDB): GCVE-100-175592

Entryinfo

Created: 05/25/2021 09:01
Updated: 11/04/2025 22:58
Changes: 05/25/2021 09:01 (36), 05/27/2021 14:48 (2), 11/04/2025 22:58 (34)
Complete: 🔍
Cache ID: 216::103

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