CVE-2026-107614
CVE-2026-107614
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (issue-tracking)
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (release-notes, patch)
Frequently asked questions
- What is CVE-2026-107614?
- CVE-2026-107614 is a medium-severity vulnerability, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-10-08.
- How severe is CVE-2026-107614?
- Medium severity. CVSS v3 base score is 6.1 out of 10.