CVE-2026-107613

A NULL pointer dereference vulnerability in the Win8ScreenDriver component of GlavSoft TightVNC Server for Windows before 2.8.88 allows an attacker to crash the server, causing a denial of service. When re-initialization of the DXGI Desktop Duplication driver fails in applyNewScreenProperties() (for example after a GPU reset, display hot-plug or session change), m_drvImpl is left NULL and is subsequently dereferenced without a check by executeDetection(), getScreenBuffer(), grabFb(), getScreenPropertiesChanged() and getCursorPosition().

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://sourceforge.net/p/vnc-tight/bugs/1660/
https://www.tightvnc.com/whatsnew.php

Configurations

No configuration.

History

08 Oct 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-08 14:16

Updated : 2026-10-08 21:10

NVD link : CVE-2026-107613

Mitre link : CVE-2026-107613

CVE.ORG link : CVE-2026-107613

JSON object : View

Products Affected

No product.

CWE

CWE-476

NULL Pointer Dereference

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