Privilege escalation in Megatec Taiwan Upsilon2000v6.0
CVE-2025-66266
The RupsMon.exe service executable in UPSilon 2000 has insecure permissions, allowing the 'Everyone' group Full Control. A local attacker can replace the executable with a malicious binary to execute code with SYSTEM privileges or simply change the config path of the service to a command; starting and stopping the service to immediately achieve code execution and privilege escalation
Vulnerability class: Privilege Escalation
EPSS: 0.001 (3.3th percentile) — read the EPSS interpretation.
Affected products
- Megatec Taiwan Upsilon2000v6.0 — versions 6.0.5