{"id":"CVE-2021-47793","details":"Telegram Desktop 2.9.2 contains a denial of service vulnerability that allows attackers to crash the application by sending an oversized message payload. Attackers can generate a 9 million byte buffer and paste it into the messaging interface to trigger an application crash.","modified":"2026-07-09T05:14:42.086527Z","published":"2026-01-16T00:16:23.207Z","references":[{"type":"WEB","url":"https://telegram.org"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/telegram-desktop-denial-of-service-poc"},{"type":"EVIDENCE","url":"https://www.exploit-db.com/exploits/50247"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/telegramdesktop/tdesktop","events":[{"introduced":"437d35d8c4ffa4389e870f700ab61a9742d61642"},{"last_affected":"437d35d8c4ffa4389e870f700ab61a9742d61642"}],"database_specific":{"cpe":"cpe:2.3:a:telegram:telegram_desktop:2.9.2:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.9.2"},{"last_affected":"2.9.2"}],"source":"CPE_STRING"}}],"versions":["2.9.2","v2.9.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47793.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}