CVE Watch8 oct 2026

CVE-2026-107611

An out-of-bounds read vulnerability in the ZRLE decoder of GlavSoft TightVNC Viewer for Windows before 2.8.88 allows a malicious or compromi

CVSS

7.1

Alto

EPSS

0.2%

p14

KEV

—

Exploit Today

0-100

Publicado: 8 oct 2026 · Última mod.: 8 oct 2026 · CWE-125

EPSS · 30d

0.2%EPSS · 30 días0.2%

2026-10-092026-10-25

Descripción técnica

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.

Referencias oficiales

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