CVE-2018-25259: Lizardsystems Terminal Services Manager

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Terminal Services Manager 3.1 contains a stack-based buffer overflow vulnerability in the computer names field that allows local attackers to execute arbitrary code by triggering structured exception handling. Attackers can craft a malicious input file with shellcode and jump instructions that overwrite the SEH handler pointer to execute calc.exe or other payloads when imported through the add computers wizard.

Affected products

• Lizardsystems Terminal Services Manager: up to and including 3.1

Published 2026-04-22. Last modified 2026-06-17.