CVE-2025-20701 is a vulnerability identified in the Bluetooth audio SDKs developed by Airoha Technology Corp., specifically impacting the AB156x, AB157x, AB158x, and AB159x series. The root cause is an incorrect authorization mechanism (CWE-863) that allows an attacker to pair a Bluetooth audio device without requiring user consent or interaction. This bypasses the normal security checks that prevent unauthorized device pairing. The vulnerability enables remote escalation of privilege, meaning an attacker can gain elevated access rights on the device remotely without needing prior execution privileges or user involvement. The affected SDK versions include Airoha IoT SDK for BT audio v5.5.0 and earlier, and Airoha AB1561x/AB1562x/AB1563x SDK v3.3.1 and earlier. The CVSS v3.1 base score is 8.8, reflecting a high severity due to the attack vector being adjacent (Bluetooth), low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. The vulnerability could allow attackers to intercept or manipulate audio streams, inject malicious commands, or disrupt device functionality. No patches or exploits are currently publicly available, but the vulnerability is published and should be addressed promptly. The flaw affects a broad range of Bluetooth audio devices that use these SDKs, commonly found in IoT and consumer electronics products.

The impact of CVE-2025-20701 is significant for organizations relying on Bluetooth audio devices powered by the affected Airoha SDKs. Unauthorized pairing can lead to remote privilege escalation, allowing attackers to gain control over audio devices without user consent. This can compromise confidentiality by enabling eavesdropping on audio streams or data leakage. Integrity may be affected if attackers inject malicious commands or alter device behavior. Availability could also be disrupted by causing device malfunctions or denial of service. The lack of required user interaction and low attack complexity increase the likelihood of exploitation, especially in environments with many Bluetooth-enabled devices. This vulnerability poses risks to consumer privacy, corporate security in BYOD scenarios, and critical IoT deployments where audio devices are integrated. The absence of known exploits in the wild provides a window for mitigation, but the high CVSS score indicates urgent attention is needed to prevent potential attacks.

To mitigate CVE-2025-20701, organizations should: 1) Monitor Airoha Technology Corp. announcements closely and apply patches or SDK updates as soon as they become available. 2) Implement strict Bluetooth device management policies, including disabling Bluetooth when not in use and restricting pairing permissions to trusted devices only. 3) Employ Bluetooth device whitelisting and authentication mechanisms to prevent unauthorized connections. 4) Conduct regular security audits of IoT and audio devices to detect anomalous pairing attempts or unauthorized device presence. 5) Use network segmentation to isolate Bluetooth-enabled devices from critical infrastructure. 6) Educate users about the risks of unauthorized Bluetooth connections and encourage vigilance in accepting pairing requests. 7) Consider deploying intrusion detection systems capable of monitoring Bluetooth traffic for suspicious activity. These measures, combined with timely patching, will reduce the attack surface and limit the potential for exploitation.