VulnerabilityAnalyzed

CVE-2021-47793

Telegram Desktop 2.9.2 contains a denial of service vulnerability that allows attackers to crash the application by sending an oversized message payload.

MEDIUM 4.6EPSS 0.51%

Does this matter?

Lower severity and a low EPSS score (0.51%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 4.0: 4.6 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.51% probability · 42th percentile
CISA KEV: Not listed
Weakness: CWE-770
Affected: telegram/telegram desktop
Source: disclosure@vulncheck.com

References

https://telegram.orgProduct
https://www.exploit-db.com/exploits/50247Exploit
https://www.vulncheck.com/advisories/telegram-desktop-denial-of-service-pocThird Party Advisory
https://www.exploit-db.com/exploits/50247Exploit

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.