CVE-2021-47793

HIGH

Telegram Desktop - Resource Allocation Without Limits

Title source: rule

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.

Exploits (1)

exploitdb WORKING POC VERIFIED

by Aryan Chehreghani · pythondoswindows

https://www.exploit-db.com/exploits/50247

View Code ZIP pw:eip

References (3)

[Product] https://telegram.org

[Exploit] https://www.exploit-db.com/exploits/50247

[Third Party Advisory] https://www.vulncheck.com/advisories/telegram-desktop-denial-of-service-poc

Scores

CVSS v3 7.5

EPSS 0.0002

EPSS Percentile 4.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-770

Status published

Products (1)

telegram/telegram_desktop 2.9.2

Published Jan 16, 2026

Tracked Since Feb 18, 2026