CVE-2021-27351: Telegram

Medium severity, CVSS 5.3. EPSS: 0.8% chance of exploitation in the next 30 days.

The Terminate Session feature in the Telegram application through 7.2.1 for Android, and through 2.4.7 for Windows and UNIX, fails to invalidate a recently active session.

Affected products

• Telegram Telegram: up to and including 2.4.7; up to and including 7.2.1

Published 2021-02-19. Last modified 2026-06-17.