What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-16 · updated 2026-06-17
• Weakness: CWE-770

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.

Affected products

• Telegram Desktop: 2.9.2

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

Get alerted when CVE-2021-47793 or the next vulnerability affects your stack