Telegram Desktop 2.9.2 - Denial of Service (PoC) | Advisories

Advisories

Telegram Desktop 2.9.2 - Denial of Service (PoC)

severity: medium
date: January 15, 2026
Affecting: Telegram Desktop 2.9.2
CVE: CVE-2021-47793
CWE: CWE-770 Allocation of Resources Without Limits or Throttling
CVSS: 4.6
CVSS V4 Vector: 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
References: ExploitDB-50247
Official Telegram Homepage
Credit: Aryan Chehreghani
Description: 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.