{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "3.3.0.0"
              }
            ]
          }
        ]
      },
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.3.14"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "45c1427f912adda4145a0040126c56fe4751e789"
            }
          ],
          "repo": "https://github.com/telegramdesktop/tdesktop",
          "type": "GIT"
        }
      ]
    }
  ],
  "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.",
  "id": "CVE-2018-17780",
  "modified": "2026-03-13T21:49:30.587388884Z",
  "published": "2018-09-29T19:29:00.237Z",
  "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"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}