CVE-2018-17780

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-09-29 · updated 2026-06-17
Weakness: CWE-200

Description

Telegram Desktop (aka tdesktop) 1.3.14, and Telegram 3.3.0.0 WP8.1 on Windows, leaks end-user public and private IP addresses during a call because of an unsafe default behavior in which P2P connections are accepted from clients outside of the My Contacts list.

Affected products

Telegram Desktop: 1.3.14
Telegram Messenger: 3.3.0.0

References

http://www.securityfocus.com/bid/105521
https://www.inputzero.io/2018/09/bug-bounty-telegram-cve-2018-17780.html
http://www.securityfocus.com/bid/105521
https://www.inputzero.io/2018/09/bug-bounty-telegram-cve-2018-17780.html

Get alerted when CVE-2018-17780 or the next vulnerability affects your stack