CVE-2023-53964: SOUND4 Big VOICE2 Firmware

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

SOUND4 IMPACT/FIRST/PULSE/Eco v2.x contains an unauthenticated vulnerability in the /usr/cgi-bin/restorefactory.cgi endpoint that allows remote attackers to reset device configuration. Attackers can send a POST request to the endpoint with specific data to trigger a factory reset and bypass authentication, gaining full system control.

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 2025-12-22. Last modified 2026-06-17.