CVE-2026-107611

Published: Ott 08, 2026 Last Modified: Ott 08, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,1
Source: 33c584b5-0579-4c06-b2a0-8d8329fcab9c
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: required
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: high

Description

AI Translation Available

An out-of-bounds read vulnerability in the ZRLE decoder of GlavSoft TightVNC Viewer for Windows before 2.8.88 allows a malicious or compromised VNC server to read heap memory beyond the palette allocation and crash the viewer by sending ZRLE-encoded tiles whose palette indices exceed the declared palette size. readPaletteRleTile() and readPackedPaletteTile() use the attacker-supplied index to look up colours without validating it against the palette size; out-of-bounds heap data is copied into the framebuffer (garbled display) or the read faults, terminating the viewer.

125

Out-of-bounds Read

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Availability Other
Potential Impacts:
Read Memory Bypass Protection Mechanism Dos: Crash, Exit, Or Restart Varies By Context
Applicable Platforms
Languages: Memory-Unsafe, C, C++
Technologies: ICS/OT
View CWE Details
https://sourceforge.net/p/vnc-tight/bugs/1657/
https://sourceforge.net/p/vnc-tight/bugs/1657/
https://www.tightvnc.com/whatsnew.php
https://www.tightvnc.com/whatsnew.php