CVE-2023-53964 SOUND4 IMPACT/FIRST/PULSE/Eco v2.x Unauthenticated Factory Reset Vulnerability

High 8.8 Published 22 Dec 2025 Updated 1 Oct 2026

Remote attackers can bypass authentication to trigger a factory reset on SOUND4 audio processors, gaining full system control.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-53964?

CVE-2023-53964 is a high-severity authentication bypass vulnerability in Kantar Media BigVoice2, published on 22 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-306

Which versions are affected by CVE-2023-53964?

It affects 9 products.

Products include Sound4 Big Voice2 Firmware, Sound4 Big Voice4 Firmware, Sound4 First Firmware, Sound4 Impact Eco Firmware, Sound4 Impact Firmware, Sound4 Pulse Eco Firmware and 3 more.

How do I fix CVE-2023-53964?

No fix has been published for CVE-2023-53964 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2023-53964 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53964 exists.

Sources

Also known as GHSA-8hmq-qqfm-9gx3.