CVE-2023-22955: Audiocodes 405hd Firmware

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

An issue was discovered on AudioCodes VoIP desk phones through 3.4.4.1000. The validation of firmware images only consists of simple checksum checks for different firmware components. Thus, by knowing how to calculate and where to store the required checksums for the flasher tool, an attacker is able to store malicious firmware.

Affected products

• Audiocodes 405hd Firmware: up to and including 3.4.4.1000
• Audiocodes 445hd Firmware: up to and including 3.4.4.1000
• Audiocodes c450hd Firmware: up to and including 3.4.4.1000

Published 2023-08-11. Last modified 2026-06-17.