CVE-2021-30496

MEDIUM
Published Apr 20, 20215y ago · Modified Jun 17, 20262w ago
5.7 CVSS 3.1
Medium
Find Similar
Published Apr 20, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

The Telegram app 7.6.2 for iOS allows remote authenticated users to cause a denial of service (application crash) if the victim pastes an attacker-supplied message (e.g., in the Persian language) into a channel or group. The crash occurs in MtProtoKitFramework. NOTE: the vendor's perspective is that "this behavior can't be considered a vulnerability."

CVSS Details

Base Score
5.7
Exploitability
2.1
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-121

Affected Products 1

VendorProductVersionRange
telegramtelegram7.6.2any

References 2

  • gist.github.com https://gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31
    ExploitThird Party Advisory
  • t.me https://t.me/joinchat/bJ9cnUosVh03ZTI0
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.