Auth bypass in Kantar Media Wm2
CVE-2023-53964
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 61.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Kantar Media Wm2 — versions 1.11
- Sound4 Big Voice2
- Sound4 Big Voice2 Firmware — versions 1.30
- Sound4 Big Voice4
- Sound4 Big Voice4 Firmware — versions 1.2
- Sound4 First — versions 2.0, 1.0
- Sound4 First Firmware — versions 2.15, 1.69
- Sound4 Impact — versions 2.0, 1.0
- Sound4 Impact Eco
- Sound4 Impact Eco Firmware — versions 1.16
Weakness classification (CWE)
References
- ExploitDB-51174 (Exploit, exploit, Third Party Advisory, VDB Entry)
- SOUND4 Official Product Homepage (Product, product)
- Zero Science Lab Disclosure (ZSL-2022-5742) (Exploit, Third Party Advisory, third-party-advisory)
- VulnCheck Advisory: SOUND4 IMPACT/FIRST/PULSE/Eco v2.x Unauthenticated Factory Reset Vulnerability (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-53964?
- CVE-2023-53964 is a critical-severity vulnerability in Kantar Media Wm2, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-12-22.
- How severe is CVE-2023-53964?
- Critical severity. CVSS v3 base score is 9.8 out of 10.