CVE-2021-47793 | THREATINT

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.

PUBLISHED Reserved 2026-01-14 | Published 2026-01-15 | Updated 2026-01-16 | Assigner VulnCheck

MEDIUM: 4.6CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Allocation of Resources Without Limits or Throttling

Product status

2.9.2

affected

Credits

Aryan Chehreghani finder

References

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

www.exploit-db.com/exploits/50247 (ExploitDB-50247) exploit

telegram.org (Official Telegram Homepage) product

www.vulncheck.com/.../telegram-desktop-denial-of-service-poc (VulnCheck Advisory: Telegram Desktop 2.9.2 - Denial of Service (PoC)) third-party-advisory

cve.org (CVE-2021-47793)

nvd.nist.gov (CVE-2021-47793)

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