HOMEVULNERABILITIESCVE-2020-26559
HIGH

CVE-2020-26559

CWE-863Published: May 24, 2021· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2020-26559 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

bluetooth1 product(s)
mesh profile
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://kb.cert.org/vuls/id/799380
ADVISORYhttps://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/
ADVISORYhttps://kb.cert.org/vuls/id/799380
ADVISORYhttps://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/

All References (5)

→
https://kb.cert.org/vuls/id/799380Third Party Advisory · US Government Resource
→
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/Vendor Advisory
→
https://kb.cert.org/vuls/id/799380Third Party Advisory · US Government Resource
→
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/Vendor Advisory
→
https://www.kb.cert.org/vuls/id/799380

Quick Facts

CVE IDCVE-2020-26559
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-863
CISA KEVNo
Affected1 vendor(s)
PublishedMay 24, 2021

Related CVEs (CWE-863)

CVE-2026-44330
10.0
CVE-2026-48286
10.0
CVE-2020-13300
10.0
CVE-2026-48321
10.0
CVE-2021-38503
10.0
CVE-2026-48303
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-26559 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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