CVE-2026-107615
High
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).
SeverityHigh
CVSS7.8
Exploit probability—
ProductTightVNC
PublishedOct 8, 2026
First seenOct 8, 2026
Weakness typeCWE-427CWE-427
How to fix
Update
- GlavSoft TightVNC2.8.88 or later
Patches
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| GlavSoft TightVNC | v < 2.8.88 | 2.8.88 |
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