{"id":"CVE-2018-17780","details":"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.","modified":"2026-07-08T05:54:27.091143517Z","published":"2018-09-29T19:29:00.237Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"3.3.0.0"},{"last_affected":"3.3.0.0"}],"vendor_product":"telegram:telegram_messenger","source":"CPE_STRING","cpes":["cpe:2.3:a:telegram:telegram_messenger:3.3.0.0:*:*:*:*:windows:*:*"]}]},"references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/105521"},{"type":"EVIDENCE","url":"https://www.inputzero.io/2018/09/bug-bounty-telegram-cve-2018-17780.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/telegramdesktop/tdesktop","events":[{"introduced":"45c1427f912adda4145a0040126c56fe4751e789"},{"last_affected":"45c1427f912adda4145a0040126c56fe4751e789"}],"database_specific":{"extracted_events":[{"introduced":"1.3.14"},{"last_affected":"1.3.14"}],"cpe":"cpe:2.3:a:telegram:telegram_desktop:1.3.14:*:*:*:*:*:*:*","source":"CPE_STRING"}}],"versions":["1.3.14","v1.3.14"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-17780.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}