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
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.3
- CVSS vector
- CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
- EPSS probability
- 0.14%
- CWE
- CWE-269
- Published
- 2025-11-26
- Last modified
- 2026-03-13
Affected products
- MegaTec Taiwan UPSilon2000V6.0
Weakness type
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