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CVE-2023-53955

Sound4 First Firmware broken access control

9.8 CRITICALPublic exploitEPSS 0.85%
  1. Published22 Dec 2025

Description

SOUND4 IMPACT/FIRST/PULSE/Eco v2.x contains an insecure direct object reference vulnerability that allows attackers to bypass authorization and access hidden system resources. Attackers can exploit the vulnerability by manipulating user-supplied input to execute privileged functionalities without proper authentication.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Sound4 Stream Extension2.4.29
Sound4 Big Voice2 Firmware1.30
Sound4 Big Voice4 Firmware1.2
Sound4 First Firmware1.69 · 2.15
Sound4 Impact Eco Firmware1.16
Sound4 Impact Firmware1.69 · 2.15
Sound4 Pulse Eco Firmware1.16
Sound4 Pulse Firmware1.69 · 2.15
Sound4 Wm2 Firmware1.11

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2023-53955 being actively exploited?

CVE-2023-53955 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.85%.

How severe is CVE-2023-53955?

CVE-2023-53955 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.85% probability of exploitation.

Which products are affected by CVE-2023-53955?

Affected products include Sound4 Stream Extension, Sound4 Big Voice2 Firmware, Sound4 Big Voice4 Firmware, Sound4 First Firmware, Sound4 Impact Eco Firmware, and 4 more.

How do I fix CVE-2023-53955?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-53955 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.