CVE-2026-7701
Deferred Deferred - Pending Action
Null Pointer Dereference in Telegram Desktop Bot API

Publication date: 2026-05-03

Last updated on: 2026-05-19

Assigner: VulDB

Description
A security vulnerability has been detected in Telegram Desktop up to 6.7.5. This vulnerability affects the function RequestButton of the file Telegram/SourceFiles/boxes/url_auth_box.cpp of the component Bot API. The manipulation of the argument login_url leads to null pointer dereference. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. There is ongoing doubt regarding the real existence of this vulnerability. Upgrading to version 6.7.6 is able to resolve this issue. Upgrading the affected component is recommended. The vendor provides this rationale for the dispute: "[T]he described scenario does not lead to any security issue or vulnerability, and only causes a one-time crash. In the outlined scenario, the targeted user must perform an active action, which doesn't produce any consequences after the app is relaunched."
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Meta Information
Published
2026-05-03
Last Modified
2026-05-19
Generated
2026-06-16
AI Q&A
2026-05-03
EPSS Evaluated
2026-06-15
NVD
CVE-2026-7701
EUVD
EUVD-2026-26839
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
telegram desktop to 6.7.5 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
CWE-404 The product does not release or incorrectly releases a resource before it is made available for re-use.
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Executive Summary

This vulnerability exists in Telegram Desktop up to version 6.7.5, specifically in the Bot API component's RequestButton function located in the file Telegram/SourceFiles/boxes/url_auth_box.cpp. The issue arises from the manipulation of the argument login_url, which leads to a null pointer dereference. This means that an attacker can remotely trigger the application to access a null pointer, potentially causing the program to crash or behave unexpectedly.

Impact Analysis

The impact of this vulnerability is primarily a denial of service condition, as the null pointer dereference can cause Telegram Desktop to crash or become unstable. Since the attack can be initiated remotely without any privileges, it could disrupt the normal use of the application for users. However, there is no indication that this vulnerability leads to data compromise or unauthorized access.

Compliance Impact

The provided information does not specify how the vulnerability in Telegram Desktop affects compliance with common standards and regulations such as GDPR or HIPAA.

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