CVE-2021-31321

HighCVSS 7.1/10Last modified Jun 17, 2026

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 3.1 7.1/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://www.shielder.it/advisories/telegram-rlottie-gray_split_cubic-stack-buffer-overflow/Exploit, Third Party Advisory
https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/Exploit, Third Party Advisory
https://www.shielder.it/advisories/telegram-rlottie-gray_split_cubic-stack-buffer-overflow/Exploit, Third Party Advisory
https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/Exploit, Third Party Advisory

Timeline

Published: May 18, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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