CVE-2021-36769

Name: CVE-2021-36769
Creator: NVD / NIST
Published: 2021-07-17T00:15:07.847+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.05%

Last modified Jun 17, 2026

CVE-2021-36769 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. An attacker can cause the server to receive messages in a different order than they were sent a client.. EPSS estimates a 1.05% chance of exploitation in the next 30 days.

Description

A reordering issue exists in Telegram before 7.8.1 for Android, Telegram before 7.8.3 for iOS, and Telegram Desktop before 2.8.8. An attacker can cause the server to receive messages in a different order than they were sent a client.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

1.05%

59.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Telegram	Telegram	< 7.8.1
Telegram	Telegram	< 7.8.3
Telegram	Telegram Desktop	< 2.8.8

References

https://mtpsym.github.ioTechnical Description, Third Party Advisory
https://mtpsym.github.ioTechnical Description, Third Party Advisory

Timeline

Published: Jul 17, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-36769?

How severe is CVE-2021-36769?

CVE-2021-36769 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36769?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36769?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST