Telegram Desktop Vulnerability: How One Click Could Risk Your Account
Introduction A single click can sometimes create a serious cybersecurity risk. In September 2026, a reported vulnerability in Telegram Desktop highlighted how improper handling of external links could potentially expose users’ local files and compromise their accounts. According to the published advisory, the vulnerability affected versions earlier than 7.2.9. How Does the Vulnerability Work? The reported flaw involved improper handling of the semicolon ( ; ) character in Telegram Desktop’s internal communication mechanism, known as inter-process communication (IPC). An attacker could potentially exploit this weakness using a specially crafted external link. Under the necessary conditions, the application might interpret injected data as additional commands, allowing sensitive local files to be transmitted to an attacker-controlled Telegram chat. If usable session data were exposed, account takeover could also become possible. However, clicking an arbitrary link does not automat...