CVE-2021-47793 MEDIUM

CVE-2021-47793: Telegram Desktop 2.9.2 - Denial of Service (PoC)

Vendor Telegram
Product Telegram Desktop
Weakness CWE-770 · Uncontrolled resource consumption
Published January 15, 2026
Last update March 5, 2026
View on NVD All CVEs

CVSS base score

4.6/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 15, 2026 CVE published
March 5, 2026 Record updated