The Bluetooth BR/EDR specification up to and including version 5.1 permits sufficiently low encryption key length and does not prevent an attacker from influencing the key length negotiation. This allows practical brute-force attacks (aka "KNOB") that can decrypt traffic and inject arbitrary ciphertext without the victim noticing.

In Apple iOS 7 through 9, due to a BlueBorne flaw in the implementation of LEAP (Low Energy Audio Protocol), a large audio command can be sent to a targeted device and lead to a heap overflow with attacker-controlled data. Since the audio commands sent via LEAP are not properly validated, an attacker can use this overflow to gain full control of the device through the relatively high privileges of the Bluetooth stack in iOS. The attack bypasses Bluetooth access control; however, the default "Bluetooth On" value must be present in Settings.

CoreText in Apple iOS 8.x through 8.3 allows remote attackers to cause a denial of service (reboot and messaging disruption) via crafted Unicode text that is not properly handled during display truncation in the Notifications feature, as demonstrated by Arabic characters in (1) an SMS message or (2) a WhatsApp message.

Use-after-free vulnerability in JavaScriptCore in WebKit in Apple iTunes before 9.2 on Windows, and Apple iOS before 4 on the iPhone and iPod touch, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors related to page transitions, a different vulnerability than CVE-2010-1763 and CVE-2010-1769.