CVE-2021-47793

EUVD-2026-3030
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
VulnCheckCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 3%
Affected Products (NVD)
VendorProductVersion
telegramtelegram_desktop
2.9.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://telegram.org
https://www.exploit-db.com/exploits/50247
https://www.vulncheck.com/advisories/telegram-desktop-denial-of-service-poc
https://www.exploit-db.com/exploits/50247