CVE-2023-53964Public exploitNetwork attack vector

Unauthenticated factory reset via unprotected CGI endpoint

Published Dec 22, 2025 · Updated Dec 22, 2025

Missing authentication in SOUND4 BIG VOICE 2 1.30, BIG VOICE 4 1.2, and WM2 1.11 allows remote attackers to reset configuration. The /usr/cgi-bin/restorefactory.cgi handler accepts a POST body without checking authentication and restores factory defaults. Network access to the appliance is sufficient; the request reboots it with default settings, erases its deployed configuration, and exposes administrative access through default credentials.

CVSS severity8.8
High
EPSS probability0.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in SOUND4 BIG VOICE 2 1.30, BIG VOICE 4 1.2, and WM2 1.11 allows remote attackers to reset configuration. The /usr/cgi-bin/restorefactory.cgi handler accepts a POST body without checking authentication and restores factory defaults. Network access to the appliance is sufficient; the request reboots it with default settings, erases its deployed configuration, and exposes administrative access through default credentials.

The record

CVE
CVE-2023-53964
Published
Dec 22, 2025
Updated
Dec 22, 2025
Vendor
Kantar Media
Product
BIG VOICE 2
Classifications
CWE-306, T1529, T1485
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.30

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kantar Media · BIG VOICE 2version=1.30
Kantar Media · WM2version=1.11
Kantar Media · BIG VOICE 4version=1.2

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.8VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1529System Shutdown/Reboot
T1485Data Destruction

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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