CVE-2026-107612
CVE-2026-107612
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (issue-tracking)
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (release-notes, patch)
Frequently asked questions
- What is CVE-2026-107612?
- CVE-2026-107612 is a high-severity vulnerability, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 7.8/10. Published 2026-10-08.
- How severe is CVE-2026-107612?
- High severity. CVSS v3 base score is 7.8 out of 10.