CVE-2017-17715: Telegram Messenger

High severity, CVSS 8.8. EPSS: 1.7% chance of exploitation in the next 30 days.

The saveFile method in MediaController.java in the Telegram Messenger application before 2017-12-08 for Android allows directory traversal via a pathname obtained in a file-transfer request from a remote peer, as demonstrated by writing to tgnet.dat or tgnet.dat.bak.

Affected products

• Telegram Telegram Messenger: before 2017-12-08 (fixed in 2017-12-08)

Published 2017-12-16. Last modified 2026-06-17.