CVE-2023-47304: Vonage VDV23 Firmware

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in Vonage Box Telephone Adapter VDV23 version VDV21-3.2.11-0.5.1, allows local attackers to bypass UART authentication controls and read/write arbitrary values to the memory of the device.

Affected products

• Vonage VDV23 Firmware: version vdv21-3.2.11-0.5.1 only

Published 2023-12-05. Last modified 2026-06-17.