CVE-2026-7701

Summary

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."

Affected Software

VendorProductVersion RangeStatus
TelegramDesktop6.7.0affected
TelegramDesktop6.7.1affected
TelegramDesktop6.7.2affected
TelegramDesktop6.7.3affected
TelegramDesktop6.7.4affected
TelegramDesktop6.7.5affected
TelegramDesktop6.7.6unaffected

Weaknesses

  • CWE-476: NULL Pointer Dereference
  • CWE-404: Denial of Service

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: partial

Additional References

References