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CVE-2021-31321 Details

Description

Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Stack Based Overflow in the gray_split_cubic function of their custom fork of the rlottie library. A remote attacker might be able to overwrite Telegram's stack memory out-of-bounds on a victim device via a malicious animated sticker.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.1 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://www.shielder.it/advisories/telegram-rlottie-gray_split_cubic-stack-buffer-overflow/	CVE	ExploitThird Party Advisory
https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/	CVE	ExploitThird Party Advisory
https://www.shielder.it/advisories/telegram-rlottie-gray_split_cubic-stack-buffer-overflow/	[email protected]	ExploitThird Party Advisory
https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/	[email protected]	ExploitThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	[email protected]

Affected Products

Product	Versions
telegram telegram	< 7.1.0
CPE cpe:2.3:a:telegram:telegram::::::android::* cpe:2.3:a:telegram:telegram::::::iphone_os::* cpe:2.3:a:telegram:telegram::::::macos::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
May 25, 2021	Initial Analysis	[email protected]