{"id":"CVE-2026-107614","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-107614","generatedAt":"2026-10-28T01:02:29.332Z","title":"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…","description":"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.","published":"2026-10-08T14:16:50.000Z","lastModified":"2026-10-08T21:10:00.000Z","status":"Awaiting Analysis","sourceIdentifier":"33c584b5-0579-4c06-b2a0-8d8329fcab9c","cvss":{"version":"3.1","score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H"},"cwe":["CWE-125","CWE-191"],"affected":[],"epss":{"score":0.00106,"percentile":0.0108,"date":"2026-10-26","history":[{"date":"2026-10-09","score":0.00105,"percentile":0.0102}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.11%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-08T14:16:50.000Z","detail":{"score":"6.1","severity":"MEDIUM","publishedAt":"2026-10-08T14:16:50.163Z"},"summary":"New CVE, medium severity (CVSS 6.1)."}],"references":[{"url":"https://sourceforge.net/p/vnc-tight/bugs/1661/","source":"33c584b5-0579-4c06-b2a0-8d8329fcab9c"},{"url":"https://www.tightvnc.com/whatsnew.php","source":"33c584b5-0579-4c06-b2a0-8d8329fcab9c"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107614","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}