{"id":"CVE-2026-107615","revision":"6803434818364acb81b59e5a8e9e1508","records":[{"revision":"6803434818364acb81b59e5a8e9e1508","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-107615","aliases":[],"title":"DLL search order hijacking via screenhooks libraries in TightVNC Server","description":"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).","state":0,"publishedAt":"2026-10-08T13:39:59.358+00:00","modifiedAt":"2026-10-08T14:00:27.042+00:00","affected":[{"ecosystem":"Vendor product","name":"TightVNC","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"GlavSoft\",\n                    \"product\": \"TightVNC\",\n                    \"platforms\": [\n                        \"Windows\"\n                    ],\n                    \"modules\": [\n                        \"TightVNC Server (screen hooks loader)\"\n                    ],\n                    \"programFiles\": [\n                        \"DynamicLibrary.cpp\",\n                        \"ThemeLib.cpp\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"DynamicLibrary::init()\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.8.88\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://sourceforge.net/p/vnc-tight/bugs/1666/","https://www.tightvnc.com/whatsnew.php"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-107615","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-107615","identifiers":["CVE-2026-107615"]},"retained":false,"historicalAffected":[]}],"coverage":[]}