Read the docs
TI-2021-10892 Aliases CVE-2021-30496GHSA-25r9-gpg2-xcwf

The Telegram app 7.6.2 for iOS allows remote authenticated users to cause a denial of…

Priority MEDIUM 59CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

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."

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01177 67th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:telegram:telegram:7.6.2:*:*:*:*:iphone_os:*:*7.6.2VulnerableTelegram
  • cpe:2.3:a:telegram:telegram:7.6.2:*:*:*:*:iphone_os:*:* Versions 7.6.2 Vulnerable ·Telegram

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-30496
  2. 2026-10-03 Alias added: GHSA-25r9-gpg2-xcwf

References

Exploit 1

Advisory 1

  • TI-2018-11088 An issue was discovered in the org.telegram.messenger application 4.8.11 for Android. CVSS 3.0MEDIUM 6.8
  • TI-2023-11787 Telegram 9.3.1 and 9.4.0 allows attackers to access restricted files, microphone ,or… CVSS 3.1MEDIUM 5.5
  • TI-2019-07370 Telegram Desktop before 1.5.12 on Windows, and the Telegram applications for Android… CVSS 3.0HIGH 8.8
  • TI-2018-14480 The "secret chat" feature in Telegram 4.9.1 for Android has a "side channel" in which… CVSS 3.0HIGH 8.1
  • TI-2024-06509 Improper multimedia file attachment validation in Telegram for Android app CVSS 4.0HIGH 7.1
  • TI-2021-11472 Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected… CVSS 3.1HIGH 7.1
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences