{"id":"UBUNTU-CVE-2026-107615","details":"An uncontrolled search path element vulnerability in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to execute arbitrary code with SYSTEM privileges. DynamicLibrary::init() (and ThemeLib) load screenhooks32.dll / screenhooks64.dll with LoadLibrary() using a bare file name and no LOAD_LIBRARY_SEARCH_* flags, so the TightVNC service follows the default DLL search order and loads an attacker-planted DLL from a writable directory earlier in that order (for example, an installation directory with permissive ACLs).","modified":"2026-10-14T03:22:47.593475186Z","published":"2026-10-13T00:00:00Z","upstream":["CVE-2026-107615"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-107615"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-107615"},{"type":"REPORT","url":"https://sourceforge.net/p/vnc-tight/bugs/1666/"},{"type":"REPORT","url":"https://www.tightvnc.com/whatsnew.php"}],"affected":[{"package":{"name":"tightvnc","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/tightvnc?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.9-6.4","1.3.9-6.4ubuntu1","1.3.9-6.5+deb8u1build0.14.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"tightvncserver","binary_version":"1.3.9-6.5+deb8u1build0.14.04.1~esm1"},{"binary_version":"1.3.9-6.5+deb8u1build0.14.04.1~esm1","binary_name":"xtightvncviewer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107615.json"}},{"package":{"name":"tightvnc","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/tightvnc?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.10-0ubuntu2","1.3.10-0ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.10-0ubuntu3","binary_name":"tightvncserver"},{"binary_version":"1.3.10-0ubuntu3","binary_name":"xtightvncviewer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107615.json"}},{"package":{"name":"tightvnc","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/tightvnc?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.10-0ubuntu3","1.3.10-0ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_name":"tightvncserver","binary_version":"1.3.10-0ubuntu4"},{"binary_version":"1.3.10-0ubuntu4","binary_name":"xtightvncviewer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107615.json"}},{"package":{"name":"tightvnc","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tightvnc?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.10-0ubuntu5"],"ecosystem_specific":{"binaries":[{"binary_name":"tightvncserver","binary_version":"1.3.10-0ubuntu5"},{"binary_version":"1.3.10-0ubuntu5","binary_name":"xtightvncviewer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107615.json"}},{"package":{"name":"tightvnc","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/tightvnc?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.3.10-3","1:1.3.10-5"],"ecosystem_specific":{"binaries":[{"binary_name":"tightvncpasswd","binary_version":"1:1.3.10-5"},{"binary_name":"tightvncserver","binary_version":"1:1.3.10-5"},{"binary_name":"xtightvncviewer","binary_version":"1:1.3.10-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107615.json"}},{"package":{"name":"tightvnc","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/tightvnc?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.3.10-7","1:1.3.10-7build1","1:1.3.10-7build2","1:1.3.10-8"],"ecosystem_specific":{"binaries":[{"binary_name":"tightvncpasswd","binary_version":"1:1.3.10-8"},{"binary_version":"1:1.3.10-8","binary_name":"tightvncserver"},{"binary_name":"xtightvncviewer","binary_version":"1:1.3.10-8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107615.json"}},{"package":{"name":"tightvnc","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/tightvnc?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.3.10-10","1:1.3.10-10build1"],"ecosystem_specific":{"binaries":[{"binary_name":"tightvncpasswd","binary_version":"1:1.3.10-10build1"},{"binary_name":"tightvncserver","binary_version":"1:1.3.10-10build1"},{"binary_version":"1:1.3.10-10build1","binary_name":"xtightvncviewer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107615.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}