What’s Vulnerable › Vulnerabilities

CVE-2021-30496

• Severity: medium (CVSS 5.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-20 · updated 2026-06-17
• Weakness: CWE-121

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."

Affected products

• Telegram: 7.6.2

References

• https://gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31
• https://t.me/joinchat/bJ9cnUosVh03ZTI0
• https://gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31
• https://t.me/joinchat/bJ9cnUosVh03ZTI0

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