Security Alert for Systems with IP Based SIP Trunks

Hackers are becoming smarter at thwarting IP based security. Upgrade to Update 8A immediately.

IP based SIP Trunk users are increasingly at risk of hacker attacks. Recently we have seen a surge in techniques and methods which can circumvent systems with loosely configured security.

If you haven’t locked down your IP based SIP trunk for today’s environment your system is at risk. 3CX urges you to upgrade to update 8A immediately which provides protection for the latest attacks. If you’re on 3CX Hosted no action required.

Fraudulent Outbound Calling

Although thought to be generally more secure because attackers can’t spoof your IP easily, the reality is hackers have found a workaround facilitating fraudulent outbound calls through customer phone systems without any credentials.

Upgrade to Update 8A Urgently

1. Log in to the Admin Console.
2. Navigate to System > Updates.
3. Select Update 8A and click Download.

For a new, on-premise installation:

• 3CX Windows Installer.
• 3CX Windows Installation Guide.
• Download the 3CX ISO.
• 3CX Linux Installation Guide.

Start a new cloud deployment here.

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For the latest updates

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3. Use our Forum to ask questions and join the conversation on best practices
4. Support
   1. Log into your 3CX portal account.
   2. Click "More" menu top right.
   3. Select "Support".
   4. Click "Create ticket".
   5. Select the instance you want to ask a question about.
   6. Enter support question - auto reply receipt confirmation followed later by response