{"id":"CVE-2026-107613","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-107613","generatedAt":"2026-10-28T01:49:19.943Z","title":"A NULL pointer dereference vulnerability in the Win8ScreenDriver component of GlavSoft TightVNC Server for Windows before 2.8.88 allows an attacker to crash the server, causing a denial of service.","description":"A NULL pointer dereference vulnerability in the Win8ScreenDriver component of GlavSoft TightVNC Server for Windows before 2.8.88 allows an attacker to crash the server, causing a denial of service. When re-initialization of the DXGI Desktop Duplication driver fails in applyNewScreenProperties() (for example after a GPU reset, display hot-plug or session change), m_drvImpl is left NULL and is subsequently dereferenced without a check by executeDetection(), getScreenBuffer(), grabFb(), getScreenPropertiesChanged() and getCursorPosition().","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":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-476"],"affected":[],"epss":{"score":0.00308,"percentile":0.23455,"date":"2026-10-26","history":[{"date":"2026-10-09","score":0.00308,"percentile":0.21694}]},"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 (0.31%). 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":"5.9","severity":"MEDIUM","publishedAt":"2026-10-08T14:16:50.020Z"},"summary":"New CVE, medium severity (CVSS 5.9)."}],"references":[{"url":"https://sourceforge.net/p/vnc-tight/bugs/1660/","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-2026-107613","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."}