# TrueConf Server Vulnerabilities Used to Swap Client Installers with PhantomCore Backdoor

Attackers exploited multiple flaws in TrueConf Server to tamper with client installer files, replacing legitimate software with the PhantomCore backdoor. Organizations using TrueConf are at risk of compromise if they downloaded infected installers, and should verify integrity and patch the server immediately.

**Importance:** 4/5

## Sources

### Security
- [The Hacker News](https://thehackernews.com/2026/08/head-mare-exploits-trueconf-flaws-to.html) — Mon, 10 Aug 2026 17:03:41 +0530