{"id":"CVE-2021-36769","aliases":["DEBIAN-CVE-2021-36769","EUVD-2021-23357","GHSA-phpw-4p8w-67hr","UBUNTU-CVE-2021-36769"],"status":"published","title":"A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS,...","description":"A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. An attacker can cause the server to receive messages in a different order than they were sent a client.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01385,"percentile":0.72396,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-326"],"published":"2021-07-16T23:03:50Z","modified":"2026-10-24T14:21:19Z","fixes":[{"ecosystem":"Debian:12","package":"telegram-desktop","fixed_in":["2.9.2+ds-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"telegram-desktop","fixed_in":["2.9.2+ds-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"telegram-desktop","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.2+ds-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"telegram-desktop","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.2+ds-1"}]}],"versions":["1.0.14-1","1.0.29-1","1.1.0-1","1.1.10-1","1.1.18-1","1.1.19-1","1.1.19-2","1.1.23-1","1.1.23-1~bpo9+1","1.1.23-2","1.1.23-3","1.2.1-1","1.2.1-2","1.2.15-1","1.2.17-1","1.2.6-1","1.2.6-2","1.3.10-1","1.3.10-2","1.3.14-1","1.3.7-1","1.4.0-1","1.5.11-1","1.5.2-1","1.5.4-1","1.5.8-1","1.7.0-1","1.7.14-1","1.8.15-1","1.8.15-2","1.8.15-2~bpo10+1","1.8.2-1","1.8.2-2","1.8.4-1","1.8.8-1","1.9.14+ds-1","1.9.14+ds-2","1.9.21+ds-1","1.9.8~slim-1","2.0.1+ds-1","2.1.0+ds-1","2.1.4+ds-1","2.1.5+ds-1","2.1.7+ds-1","2.1.7+ds-2","2.2.0+ds-1","2.2.0+ds-2","2.2.0+ds-2~bpo10+1","2.2.0+ds-3","2.2.0+ds-4","2.2.0+ds-5","2.5.8+ds-1","2.5.8+ds-2","2.6.1+ds-1","2.6.1+ds-1~bpo10+1","2.9.0+ds-1","2.9.0+ds1-2","2.9.2+ds-1~bpo10+1","2.9.2+ds-1~bpo11+1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"telegram-desktop","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.23-1","1.1.23-1build1","1.1.23-2","1.1.23-3","1.2.6-1","1.2.6-2","1.2.6-2build1","1.2.6-2build2","1.2.6-2build3","1.2.15-1","1.2.15-1build1","1.2.17-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"telegram-desktop","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.8-1","1.8.15-2","1.9.8~slim-1","1.9.14+ds-1","1.9.14+ds-2","1.9.21+ds-1","2.0.1+ds-1","2.0.1+ds-1build1","2.1.7+ds-2~ubuntu20.04.1","3.1.1+ds-1~ubuntu20.04.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"telegram-desktop","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.1+ds-1","3.5.2+ds-1","3.6.1+ds-2build1"]}],"products":[{"vendor":"telegram","product":"telegram"},{"vendor":"telegram","product":"telegram_desktop"}],"references":[{"url":"https://mtpsym.github.io","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36769"},{"url":"https://github.com/advisories/GHSA-phpw-4p8w-67hr"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-36769","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-36769","tags":["report"]},{"url":"https://mtpsym.github.io/","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-36769","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-36769","description":"A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. An attacker can cause the server to receive messages in a different order than they were sent a client.","status":"published","published":"2021-07-16T23:03:50Z","modified":"2024-08-04T01:01:59.025Z","updated_at":"2026-11-02T14:33:05.989686Z"}],"euvd":[{"id":"EUVD-2021-23357","description":"A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. An attacker can cause the server to receive messages in a different order than they were sent a client.","status":"published","published":"2021-07-16T23:03:50Z","modified":"2024-08-04T01:01:59Z","updated_at":"2026-11-03T03:24:29.329171Z"}],"ghsa":[{"id":"GHSA-phpw-4p8w-67hr","title":"A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS,...","description":"A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. An attacker can cause the server to receive messages in a different order than they were sent a client.","status":"published","published":"2022-05-24T19:08:20Z","modified":"2023-08-17T05:02:15Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-326"],"updated_at":"2026-11-02T14:54:45.82233Z"}],"nvd":[{"id":"CVE-2021-36769","description":"A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. An attacker can cause the server to receive messages in a different order than they were sent a client.","status":"published","published":"2021-07-17T00:15:07.847Z","modified":"2026-06-17T03:59:08.17Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:55.747384Z"}],"osv":[{"id":"CVE-2021-36769","description":"A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. An attacker can cause the server to receive messages in a different order than they were sent a client.","status":"published","published":"2021-07-17T00:15:07.847Z","modified":"2026-10-24T14:21:19.653917277Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:20.434873Z"},{"id":"DEBIAN-CVE-2021-36769","description":"A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. An attacker can cause the server to receive messages in a different order than they were sent a client.","status":"published","published":"2021-07-17T00:15:07.847Z","modified":"2026-10-23T18:03:29.70042627Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:35.233346Z"},{"id":"UBUNTU-CVE-2021-36769","description":"A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. An attacker can cause the server to receive messages in a different order than they were sent a client.","status":"published","published":"2021-07-17T00:15:00Z","modified":"2025-10-24T04:50:26Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:27.870979Z"}]}}