CVE-2026-107612: CWE-732 Incorrect Permission Assignment for Critical Resource in GlavSoft TightVNC
Description
Incorrect permission assignment in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to read or overwrite the inter-process communication handles used between the TightVNC service and its desktop server process. The named shared memory segment in the Global\ namespace that carries the pipe HANDLE values is created with a NULL DACL, and its name is derived from a time-seeded srand(time(0)) value that is predictable to one-second granularity. A low-privileged local process can open the mapping and tamper with the IPC channel of a service running as SYSTEM, potentially leading to disclosure of session data, privilege escalation, or denial of service.
CVSS v3.1
Score 7.8high
Affected software
GlavSoft
TightVNC
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- securin
- Date Reserved
- 2026-10-08T13:23:07.677Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac7a2d82cdf04f6561cce97
Added to database: 10/08/2026, 14:04:08 UTC
Last updated: 10/08/2026, 14:04:08 UTC
Views: 1
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