CVE-2025-63220 is a remote code execution vulnerability discovered in the Sound4 FIRST web-based management interface. The vulnerability stems from the firmware update mechanism's failure to validate the integrity of the manual.sh script included in the firmware package. Attackers can exploit this by modifying manual.sh to include arbitrary commands, then repackaging the firmware and uploading it via the management interface. Since the update process does not verify the authenticity or integrity of the firmware contents, the malicious script executes with the privileges of the update process, potentially granting full control over the device. This flaw allows attackers to bypass security controls and execute arbitrary code remotely, which could be leveraged to pivot into internal networks or disrupt audio management systems. Although no specific affected versions are listed, the vulnerability applies to Sound4 FIRST devices that rely on this update mechanism. No public exploits have been reported yet, and no CVSS score has been assigned, indicating the vulnerability is newly disclosed. The lack of integrity checks in firmware updates is a critical security oversight, especially for devices deployed in enterprise or critical infrastructure environments.

For European organizations, exploitation of this vulnerability could lead to complete compromise of Sound4 FIRST devices, which may be integral to audio management in corporate, public, or critical infrastructure settings. Attackers gaining control could disrupt audio services, manipulate announcements or alerts, or use the compromised device as a foothold to access broader internal networks. This could impact confidentiality, integrity, and availability of organizational systems. Given the potential for remote code execution without user interaction once firmware upload access is obtained, the threat is significant. Organizations in sectors such as transportation, government facilities, large enterprises, and event venues that use Sound4 FIRST devices could face operational disruptions and data breaches. The absence of known exploits suggests a window for proactive mitigation, but also a risk of future exploitation once exploit code becomes available.

1. Restrict firmware update access strictly to authorized personnel and secure the management interface with strong authentication and network segmentation. 2. Implement out-of-band verification of firmware packages before deployment, including cryptographic signature validation to ensure integrity and authenticity. 3. Monitor network traffic and device logs for unusual firmware update attempts or unexpected script executions. 4. If possible, disable manual firmware updates or require updates only from trusted, signed sources. 5. Engage with the vendor for patches or updated firmware that includes integrity checks on manual.sh and other critical scripts. 6. Conduct regular security audits of devices and update procedures to detect and prevent unauthorized modifications. 7. Educate staff on the risks of firmware tampering and enforce strict operational security around device management.