HTTP/2 Bomb — CVE-2026-49975 · Full Disclosure · June 8, 2026 A recently disclosed denial-of-service vulnerability, known as HTTP/2 Bomb (CVE-2026-49975), affects multiple web server implementations. CVE-2026-49975, also known as HTTP/2 Bomb, is a remote denial-of-service exploit against most major web servers, including nginx, Apache httpd, Microsoft IIS, Envoy, and Cloudflare [...]
Action required due to a web server configuration vulnerability. 3CX has released a security hotfix relating to a third party component. If your 3CX deployment is reachable from the public internet, apply the latest update immediately. 3CX hosted instances have already received the update. Who is Affected Deployment type Publicly accessible from the internet? Action required Ho [...]
Last stop before final release. We’re rolling out RC3 to address the last minor fixes ahead of the final Update 9 release. Fixes in Release Candidate 3 VoIP Provider templates - fixed an issue where switching templates could trigger an exception. Dialer - fixed an issue where the dialer would automatically grab focus, causing accidental call pickups. Web Client - fixed delays a [...]
Hands-free automated VM provisioning for Proxmox VE. We are excited to announce a faster, hands-free method for provisioning a 3CX PBX Virtual Machine on Proxmox VE. Our newly released documentation walks you through a fully automated deployment script designed to save you time and reduce configuration errors. From Manual Clicks to Automated Provisioning Deploying virtual machi [...]
Knowledge source optimization for large datasets. Your 3CX AI Agent is a powerful tool, transforming customer interactions and streamlining support. But what happens when your agent starts to slow down, or struggles to find information in a vast pool of knowledge? Today, we're diving deep into best practices for structuring your 3CX AI Agent's knowledge sources, also commonly r [...]
Forward your 3CX operational, security and audit events directly to any Syslog server. For large enterprises, regulated industries and any organization running a Security Operations Center (SOC), having phone system events siloed on the PBX itself is no longer enough: Compliance frameworks demand centralized logging Auditors demand traceability SOC teams demand real-time visibi [...]
Minor fixes ahead of final release. Building on the successful releases of ALPHA, BETA and RC, we’re now in the final stages before Update 9 final goes live. Read on for an update on minor fixes in this RC2. Fixes in Release Candidate 2 Grok (xAI) summarization - fixed an issue where summaries were always generated in English, regardless of the transcription language, even for [...]
Celebrating the most valuable forum members. Today, the forum supports more than 160,000 international members alongside 70,000 national members. During Q1, 3CX Forum continued to be a go-to place for the community to share knowledge and discuss the latest 3CX updates. Read on to see which community members' posts during Q1 were the most helpful and precise! The Winners - Q1 20 [...]
3CX remains best in class among 100,000 products! 3CX has once again earned recognition as a Category Leader by SourceForge, this time for Spring 2026 - adding another achievement to an already successful year. The award reflects 3CX’s strong performance, customer satisfaction and reputation for quality, placing it in the top 5% of more than 100,000 products featured on SourceF [...]
New xAI Grok 4.3 model for AI transcription. Following the successful ALPHA and BETA releases, we are now releasing a Release Candidate for V20 Update 9. What’s New Added new xAI Grok 4.3 model for AI transcription Implemented chunking for xAI to support transcription of larger recordings Improved route-by-name so AI agents can identify and transfer to the correct employee more [...]
Copyright © 2026