CVEvulnerability

CVE-2026-107611

7.1 HIGH Published 2026-10-08 Modified 2026-10-08 Official page ↗
Status
Awaiting Analysis
Published
2026-10-08
Last modified
2026-10-08
Assigner
33c584b5-0579-4c06-b2a0-8d8329fcab9c
CVSS 3.1 (33c584b5-0579-4c06-b2a0-8d8329fcab9c)
7.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weaknesses
CWE-125

Description

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.

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References