High 7.5Published Jan 15, 2026

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

Updated under an hour ago (Oct 28, 2026, 8:50 AM ET)

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It affects Telegram Desktop and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Telegram Desktop

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Mar 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Telegram Telegram Desktop telegram:desktop (from the name)	2.9.2	CNA record
telegram telegram_desktop telegram:telegram_desktop	2.9.2	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.