{"id":"CVE-2026-107613","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","summary":"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 Desk…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"GlavSoft","product":"TightVNC","affected":["TightVNC < 2.8.88"],"published":"2026-10-08","updated":"2026-10-08","sourceUpdated":"2026-10-08T21:10:00.133","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107613","references":[{"url":"https://sourceforge.net/p/vnc-tight/bugs/1660/","label":"33c584b5-0579-4c06-b2a0-8d8329fcab9c"},{"url":"https://www.tightvnc.com/whatsnew.php","label":"33c584b5-0579-4c06-b2a0-8d8329fcab9c"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-08T14:01:21.134363Z"},"ingestedAt":"2026-10-08T14:47:16.341Z","slug":"CVE-2026-107613","body":"## Overview\n\nA 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().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}