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.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 16 Jan 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 16 Jan 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Telegram
Telegram telegram
Telegram telegram Desktop
Telegram Desktop
Telegram Desktop telegram Desktop
Vendors & Products Telegram
Telegram telegram
Telegram telegram Desktop
Telegram Desktop
Telegram Desktop telegram Desktop

Thu, 15 Jan 2026 23:45:00 +0000

Type Values Removed Values Added
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.
Title Telegram Desktop 2.9.2 - Denial of Service (PoC)
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 4.6, '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-01-16T21:11:53.505Z

Reserved: 2026-01-14T14:39:44.738Z

Link: CVE-2021-47793

cve-icon Vulnrichment

Updated: 2026-01-16T15:52:45.929Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-16T00:16:23.207

Modified: 2026-01-16T22:16:15.000

Link: CVE-2021-47793

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-16T13:42:31Z

Weaknesses