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No exploitation reportedFix available

CVE-2021-36769

No exploitation reported by the sources we read.

  • Published2021-07-17
  • Fixed in7.8.3 · 7.8.1

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2021-07-1700:15CVE publishedNVD

Versions per branch

NVD
Telegram
BranchAffectedFixed in
7.8< 7.8.37.8.3
7.8< 7.8.17.8.1
Telegram telegram desktop
BranchAffectedFixed in
2.8< 2.8.82.8.8

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • telegram-desktopUbuntu:22.04:LTSall versions · no fixed version listed
  • telegram-desktopUbuntu:20.04:LTSall versions · no fixed version listed
  • telegram-desktopUbuntu:18.04:LTSall versions · no fixed version listed
  • telegram-desktopDebian:14all versions · fixed in 2.9.2+ds-1
  • telegram-desktopDebian:12all versions · fixed in 2.9.2+ds-1

Full record on NVD

Fix

  1. Update Telegram to 7.8.3 · 7.8.1

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Published
2021-07-17
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-phpw-4p8w-67hr

Frequently asked questions

What is CVE-2021-36769?

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.

Is CVE-2021-36769 actively exploited?

Active exploitation of CVE-2021-36769 has not been confirmed. Its EPSS score was 1.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-36769?

CVE-2021-36769 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

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Sources for this record