CVE-2022-50796: SOUND4 Big VOICE2 Firmware

Critical severity, CVSS 9.8. EPSS: 1.6% chance of exploitation in the next 30 days.

SOUND4 IMPACT/FIRST/PULSE/Eco <=2.x contains an unauthenticated remote code execution vulnerability in the firmware upload functionality with path traversal flaw. Attackers can exploit the upload.cgi script to write malicious files to the system with www-data permissions, enabling unauthorized access and code execution.

Affected products

• SOUND4 Big VOICE2 Firmware: version 1.30 only
• SOUND4 Big VOICE4 Firmware: version 1.2 only
• SOUND4 First Firmware: version 2.15 only; version 1.69 only
• SOUND4 Impact Eco Firmware: version 1.16 only
• SOUND4 Impact Firmware: version 2.15 only; version 1.69 only
• SOUND4 Pulse Eco Firmware: version 1.16 only
• SOUND4 Pulse Firmware: version 2.15 only; version 1.69 only
• SOUND4 Stream Extension: version 2.4.29 only
• SOUND4 WM2 Firmware: version 1.11 only

Published 2025-12-30. Last modified 2026-09-24.