CVE-2020-10134
Bluetooth devices supporting LE and specific BR/EDR implementations are vulnerable to method confusion attacks
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
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 Medium
CVSS: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 Medium
CVSS: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 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV: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 Medium
CVSS: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
| Package | Affected | Fixed |
|---|---|---|
bluezUbuntu: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 less5.37-0ubuntu5.3+esm15.37-0ubuntu5.3+esm25.37-0ubuntu5.3+esm35.37-0ubuntu5.3+esm45.37-0ubuntu5.3+esm55.37-0ubuntu5.3+esm6 |
None known |
bluezUbuntu: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 less5.48-0ubuntu3.35.48-0ubuntu3.45.48-0ubuntu3.55.48-0ubuntu3.65.48-0ubuntu3.75.48-0ubuntu3.85.48-0ubuntu3.95.48-0ubuntu3.9+esm15.48-0ubuntu3.9+esm25.48-0ubuntu3.9+esm3 |
None known |
bluezUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 5.50-0ubuntu45.51-0ubuntu15.51-0ubuntu25.52-0ubuntu15.52-0ubuntu2 Show 14 moreShow less5.53-0ubuntu15.53-0ubuntu25.53-0ubuntu35.53-0ubuntu3.15.53-0ubuntu3.25.53-0ubuntu3.35.53-0ubuntu3.45.53-0ubuntu3.55.53-0ubuntu3.65.53-0ubuntu3.75.53-0ubuntu3.85.53-0ubuntu3.95.53-0ubuntu3.9+esm15.53-0ubuntu3.9+esm2 |
None known |
bluezUbuntu:22.04:LTS |
All versions, plus listed versions 5.60-0ubuntu25.62-0ubuntu15.62-0ubuntu25.63-0ubuntu15.63-0ubuntu2 Show 6 moreShow less5.64-0ubuntu15.64-0ubuntu1.15.64-0ubuntu1.35.64-0ubuntu1.45.64-0ubuntu1.55.64-0ubuntu1.6 |
None known |
bluezUbuntu:24.04:LTS |
All versions, plus listed versions 5.68-0ubuntu15.70-0ubuntu15.70-0ubuntu25.70-0ubuntu35.71-0ubuntu3 Show 13 moreShow less5.71-1ubuntu25.71-1ubuntu35.72-0ubuntu15.72-0ubuntu35.72-0ubuntu45.72-0ubuntu55.72-0ubuntu5.15.72-0ubuntu5.35.72-0ubuntu5.45.72-0ubuntu5.55.72-0ubuntu5.65.72-0ubuntu5.75.72-0ubuntu5.8 |
None known |
bluezUbuntu:25.10 |
All versions, plus listed versions 5.79-2ubuntu15.82-15.82-1ubuntu15.83-1~exp15.83-1~exp1ubuntu0.1 |
None known |
bluezUbuntu:26.10 |
All versions, plus listed versions 5.85-45.85-4ubuntu15.87-15.87-25.87-35.87-4 |
None known |
bluezUbuntu:26.04:LTS |
All versions, plus listed versions 5.83-1~exp15.84-15.85-15.85-25.85-3 Show 5 moreShow less5.85-45.85-4ubuntu0.15.85-4ubuntu0.25.85-4ubuntu0.35.85-4ubuntu0.4 |
None known |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases, published | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |