CVE-2021-30496 - Vulnerability Details - OpenCVE

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."

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication Single

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00661.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:telegram:telegram:7.6.2:*:*:*:*:iphone_os:*:*

No data.

No data.

Project Subscriptions

Vendors	Products
Telegram Subscribe	Telegram Subscribe

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

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

History

Tue, 24 Feb 2026 18:15:00 +0000

Type	Values Removed	Values Added
CPEs		cpe:2.3:a:telegram:telegram::::::iphone_os::*
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-04-20T00:00:00.000Z

Updated: 2024-08-03T22:32:41.088Z

Reserved: 2021-04-11T00:00:00.000Z

Link: CVE-2021-30496

Vulnrichment

Updated: 2024-08-03T22:32:41.088Z

NVD

Status : Modified

Published: 2021-04-20T16:15:10.590

Modified: 2024-11-21T06:04:02.233

Link: CVE-2021-30496

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

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