Audiocodes Software Upgrade 400 Series IP Phones

AudioCodes has released a new software update for its 400HD series IP Phones for Microsoft Skype for Business environments.

The software update version is AudioCodes Customers are encouraged to update their IP Phones to this latest software version.


This software update includes an important security vulnerability fix that blocks a "man-in-the-middle" (MITM) attack from gaining the end user’s username and password in specific scenarios.

Note: This security fix is not applicable to deployments that use the pin-code method for signing in to the Skype for Business IP Phones; only to deployments that use the username-password sign-in method.

Affected Phones

  • 405HD IP Phone
  • 430HD IP Phone
  • 440HD IP Phone
  • 450HD IP Phone
  • Huddle Room Solution (HRS)
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