CVE-2026-107611: fallo de gravedad alta en GlavSoft TightVNC
Out-of-bounds read in TightVNC Viewer ZRLE palette decoding
Publicada el
18Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.1
probabilidad de explotación
—
explotación observada
noninguna fuente lo reporta
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Productos afectados
GlavSoft · TightVNCCVEs relacionadas — GlavSoft TightVNC
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-107615HIGHDLL search order hijacking via screenhooks libraries in TightVNC ServerEPSS —CVE-2026-107614MEDIUMInteger underflow in TightVNC Server cursor shape trimming leads to out-of-bounds readEPSS —CVE-2026-107613MEDIUMNULL pointer dereference in TightVNC Server Win8ScreenDriver after failed DXGI re-initializationEPSS —CVE-2026-107612HIGHWorld-accessible IPC shared memory with predictable name in TightVNC ServerEPSS —