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CVE-2020-10134

Bluetooth devices supporting LE and specific BR/EDR implementations are vulnerable to method confusion attacks

6.3 Medium

CVE-2020-10134 is a medium vulnerability (CVSS 6.3) in Bluetooth Core, published May 19, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.66%, the 51st percentile. No source names a fixed version.

Pairing in Bluetooth® Core v5.2 and earlier may permit an unauthenticated attacker to acquire credentials with two pairing devices via adjacent access when the unauthenticated user initiates different pairing methods in each peer device and an end-user erroneously completes both pairing procedures with the MITM using the confirmation number of one peer as the passkey of the other. An adjacent, unauthenticated attacker could be able to initiate any Bluetooth operation on either attacked device exposed by the enabled Bluetooth profiles. This exposure may be limited when the user must authorize certain access explicitly, but so long as a user assumes that it is the intended remote device requesting permissions, device-local protections may be weakened.

Attack profile

How easy it is to exploit

Attack vector
Adjacent network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
Low
Availability
None

Exploit likelihood

0.66%Unchanged since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 6.3

Bluetooth devices supporting LE and specific BR/EDR implementations are vulnerable to method confusion attacks

Pairing in Bluetooth® Core v5.2 and earlier may permit an unauthenticated attacker to acquire credentials with two pairing devices via adjacent access when the unauthenticated user initiates different pairing methods in each peer device and an end-user erroneously completes both pairing procedures with the MITM using the confirmation number of one peer as the passkey of the other. An adjacent, unauthenticated attacker could be able to initiate any Bluetooth operation on either attacked device exposed by the enabled Bluetooth profiles. This exposure may be limited when the user must authorize certain access explicitly, but so long as a user assumes that it is the intended remote device requesting permissions, device-local protections may be weakened.

Record
CVE-2020-10134
CVSS 3.1
6.3 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Weakness
CWE-351
Updated
2026-11-02
EUVDEUVD-2020-2597 6.3

Pairing in Bluetooth® Core v5.2 and earlier may permit an unauthenticated attacker to acquire credentials with two pairing devices via adjacent access when the unauthenticated user initiates different pairing methods in each peer device and an end-user erroneously completes both pairing procedures with the MITM using the confirmation number of one peer as the passkey of the other. An adjacent, unauthenticated attacker could be able to initiate any Bluetooth operation on either attacked device exposed by the enabled Bluetooth profiles. This exposure may be limited when the user must authorize certain access explicitly, but so long as a user assumes that it is the intended remote device requesting permissions, device-local protections may be weakened.

Record
EUVD-2020-2597
CVSS 3.1
6.3 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-4fx5-wvjj-h2jp No score

Pairing in Bluetooth® Core v5.2 and earlier may permit an unauthenticated attacker to acquire...

Pairing in Bluetooth® Core v5.2 and earlier may permit an unauthenticated attacker to acquire credentials with two pairing devices via adjacent access when the unauthenticated user initiates different pairing methods in each peer device and an end-user erroneously completes both pairing procedures with the MITM using the confirmation number of one peer as the passkey of the other. An adjacent, unauthenticated attacker could be able to initiate any Bluetooth operation on either attacked device exposed by the enabled Bluetooth profiles. This exposure may be limited when the user must authorize certain access explicitly, but so long as a user assumes that it is the intended remote device requesting permissions, device-local protections may be weakened.

Record
GHSA-4fx5-wvjj-h2jp
Updated
2026-11-02
NVD 6.3

Pairing in Bluetooth® Core v5.2 and earlier may permit an unauthenticated attacker to acquire credentials with two pairing devices via adjacent access when the unauthenticated user initiates different pairing methods in each peer device and an end-user erroneously completes both pairing procedures with the MITM using the confirmation number of one peer as the passkey of the other. An adjacent, unauthenticated attacker could be able to initiate any Bluetooth operation on either attacked device exposed by the enabled Bluetooth profiles. This exposure may be limited when the user must authorize certain access explicitly, but so long as a user assumes that it is the intended remote device requesting permissions, device-local protections may be weakened.

Record
CVE-2020-10134
CVSS 3.1
6.3 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
CVSS 2.0
4.3 MediumAV:A/AC:M/Au:N/C:P/I:P/A:N
Weakness
CWE-351, CWE-436
Updated
2026-11-02
OSVUBUNTU-CVE-2020-10134 6.3

Pairing in Bluetooth® Core v5.2 and earlier may permit an unauthenticated attacker to acquire credentials with two pairing devices via adjacent access when the unauthenticated user initiates different pairing methods in each peer device and an end-user erroneously completes both pairing procedures with the MITM using the confirmation number of one peer as the passkey of the other. An adjacent, unauthenticated attacker could be able to initiate any Bluetooth operation on either attacked device exposed by the enabled Bluetooth profiles. This exposure may be limited when the user must authorize certain access explicitly, but so long as a user assumes that it is the intended remote device requesting permissions, device-local protections may be weakened.

Record
UBUNTU-CVE-2020-10134
CVSS 3.1
6.3 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
bluez
Ubuntu:Pro:16.04:LTS
All versions, plus listed versions
5.35-0ubuntu25.36-0ubuntu15.37-0ubuntu55.37-0ubuntu5.15.37-0ubuntu5.3
Show 6 moreShow less
5.37-0ubuntu5.3+esm15.37-0ubuntu5.3+esm25.37-0ubuntu5.3+esm35.37-0ubuntu5.3+esm45.37-0ubuntu5.3+esm55.37-0ubuntu5.3+esm6
None known
bluez
Ubuntu:Pro:18.04:LTS
All versions, plus listed versions
5.46-0ubuntu35.46-0ubuntu45.48-0ubuntu35.48-0ubuntu3.15.48-0ubuntu3.2
Show 10 moreShow less
5.48-0ubuntu3.35.48-0ubuntu3.45.48-0ubuntu3.55.48-0ubuntu3.65.48-0ubuntu3.75.48-0ubuntu3.85.48-0ubuntu3.95.48-0ubuntu3.9+esm15.48-0ubuntu3.9+esm25.48-0ubuntu3.9+esm3
None known
bluez
Ubuntu:Pro:20.04:LTS
All versions, plus listed versions
5.50-0ubuntu45.51-0ubuntu15.51-0ubuntu25.52-0ubuntu15.52-0ubuntu2
Show 14 moreShow less
5.53-0ubuntu15.53-0ubuntu25.53-0ubuntu35.53-0ubuntu3.15.53-0ubuntu3.25.53-0ubuntu3.35.53-0ubuntu3.45.53-0ubuntu3.55.53-0ubuntu3.65.53-0ubuntu3.75.53-0ubuntu3.85.53-0ubuntu3.95.53-0ubuntu3.9+esm15.53-0ubuntu3.9+esm2
None known
bluez
Ubuntu:22.04:LTS
All versions, plus listed versions
5.60-0ubuntu25.62-0ubuntu15.62-0ubuntu25.63-0ubuntu15.63-0ubuntu2
Show 6 moreShow less
5.64-0ubuntu15.64-0ubuntu1.15.64-0ubuntu1.35.64-0ubuntu1.45.64-0ubuntu1.55.64-0ubuntu1.6
None known
bluez
Ubuntu:24.04:LTS
All versions, plus listed versions
5.68-0ubuntu15.70-0ubuntu15.70-0ubuntu25.70-0ubuntu35.71-0ubuntu3
Show 13 moreShow less
5.71-1ubuntu25.71-1ubuntu35.72-0ubuntu15.72-0ubuntu35.72-0ubuntu45.72-0ubuntu55.72-0ubuntu5.15.72-0ubuntu5.35.72-0ubuntu5.45.72-0ubuntu5.55.72-0ubuntu5.65.72-0ubuntu5.75.72-0ubuntu5.8
None known
bluez
Ubuntu:25.10
All versions, plus listed versions
5.79-2ubuntu15.82-15.82-1ubuntu15.83-1~exp15.83-1~exp1ubuntu0.1
None known
bluez
Ubuntu:26.10
All versions, plus listed versions
5.85-45.85-4ubuntu15.87-15.87-25.87-35.87-4
None known
bluez
Ubuntu:26.04:LTS
All versions, plus listed versions
5.83-1~exp15.84-15.85-15.85-25.85-3
Show 5 moreShow less
5.85-45.85-4ubuntu0.15.85-4ubuntu0.25.85-4ubuntu0.35.85-4ubuntu0.4
None known

History

History
WhenChangedSources
2026-11-03aliases, publishedEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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