What’s Vulnerable › Vulnerabilities

CVE-2020-15509

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-07-07 · updated 2026-06-17
• Weakness: CWE-319

Description

Nordic Semiconductor Android BLE Library through 2.2.1 and DFU Library through 1.10.4 for Android (as used by nRF Connect and other applications) can engage in unencrypted communication while showing the user that the communication is purportedly encrypted. The problem is in bond creation (e.g., internalCreateBond in BleManagerHandler).

Affected products

• Nordicsemi Android Ble Library: through 2.2.1
• Nordicsemi Dfu Library: through 1.10.4

References

• https://github.com/NordicSemiconductor/Android-BLE-Library/commits/master
• https://github.com/NordicSemiconductor/Android-DFU-Library/commits/release
• https://secretdiary.ninja/index.php/2020/07/03/norec-attack-stripping-ble-encryption-from-nordicsemis-android-library-cve-2020-15509/
• https://github.com/NordicSemiconductor/Android-BLE-Library/commits/master
• https://github.com/NordicSemiconductor/Android-DFU-Library/commits/release
• https://secretdiary.ninja/index.php/2020/07/03/norec-attack-stripping-ble-encryption-from-nordicsemis-android-library-cve-2020-15509/

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