CVE-2025-1050 is a remote code execution vulnerability affecting the Sonos Era 300 smart speaker, specifically version 81.1-58074. The root cause is an out-of-bounds write (CWE-787) triggered during the processing of HTTP Live Streaming (HLS) playlist data. The vulnerability arises because the device fails to properly validate user-supplied data within the HLS playlist, allowing an attacker to write data beyond the allocated memory buffer. This memory corruption can be exploited to execute arbitrary code with the privileges of the 'anacapa' user on the device. Notably, exploitation does not require authentication, and the attacker only needs network adjacency, meaning they must be on the same local network or have network access to the device. The vulnerability was assigned by the Zero Day Initiative (ZDI) as ZDI-CAN-25606 and was publicly disclosed on April 23, 2025. No public exploits are currently known in the wild, and no patches have been linked yet. The lack of proper input validation in processing HLS playlists is a critical flaw because HLS is a common streaming protocol, and the Era 300’s role as a networked media device makes it a potential target for attackers seeking to compromise home or office environments. Successful exploitation could allow attackers to gain persistent control over the device, potentially using it as a foothold for lateral movement within a network or to eavesdrop on audio streams.

For European organizations, the impact of this vulnerability can be significant, especially in environments where Sonos Era 300 devices are deployed in conference rooms, executive offices, or public spaces. Compromise of these devices could lead to unauthorized access to internal networks if attackers use the device as a pivot point. Confidentiality is at risk as attackers could potentially intercept or manipulate audio streams. Integrity is compromised due to the possibility of arbitrary code execution, allowing attackers to alter device behavior or install malware. Availability could also be affected if the device is rendered inoperable or used in denial-of-service attacks. Given that authentication is not required and exploitation only needs network adjacency, attackers could leverage compromised Wi-Fi networks or guest networks to target these devices. The medium severity rating reflects the limited scope (single product and version) but acknowledges the high impact of remote code execution without authentication. Organizations relying on Sonos Era 300 speakers for critical communication or collaboration should consider this vulnerability a serious risk to their operational security and privacy.

1. Network Segmentation: Isolate Sonos Era 300 devices on dedicated VLANs or separate network segments with strict access controls to limit exposure to untrusted users or devices. 2. Access Control: Restrict network access to the devices by enforcing strong Wi-Fi security protocols and disabling guest network access to the same subnet as the speakers. 3. Monitoring and Detection: Implement network monitoring to detect unusual traffic patterns or attempts to send malformed HLS playlists to the devices. 4. Vendor Coordination: Engage with Sonos for timely updates and patches; prioritize deployment of firmware updates once available. 5. Disable Unnecessary Services: If possible, disable or restrict HLS streaming features or any remote playlist processing capabilities until patches are applied. 6. Incident Response Preparedness: Develop response plans for potential device compromise, including device isolation and forensic analysis. 7. User Awareness: Educate users about the risks of connecting to untrusted networks where attackers could exploit such vulnerabilities. These steps go beyond generic advice by focusing on network architecture and operational controls tailored to the unique risks posed by this vulnerability in smart speaker environments.