CVE Watch8 oct 2026

CVE-2026-107614

An integer underflow in WinCursorShapeUtils::trimTransparent() in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenti

CVSS

6.1

Medio

EPSS

0.1%

KEV

—

Exploit Today

0-100

Publicado: 8 oct 2026 · Última mod.: 8 oct 2026 · CWE-125 · CWE-191

EPSS · 30d

0.1%EPSS · 30 días0.1%

2026-10-092026-10-25

Descripción técnica

An integer underflow in WinCursorShapeUtils::trimTransparent() in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to crash the server, and potentially read out-of-bounds memory, by causing a cursor shape with a width or height of zero to be processed on the DXGI capture path. The loop bound width - 1 wraps to 0xFFFFFFFF, producing an access roughly 4 GB beyond the 64 KB cursor buffer; a monochrome cursor of height 1 also becomes 0 because getCursorHeight() halves the height in place.

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