CVE-2021-47793

HIGH 7.5

Telegram Desktop 2.9.2 - Denial of Service (PoC)

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-770
Vendor	telegram
Product	telegram desktop
Published	Jan 15, 2026
Last Updated	Mar 5, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Telegram / Telegram Desktop

2.9.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/50247 telegram.org: https://telegram.org vulncheck.com: https://www.vulncheck.com/advisories/telegram-desktop-denial-of-service-poc

Credits

Aryan Chehreghani