CVE-2025-66266
Insecure SYSTEM Service Permissions in UPSilon2000V6.0 (RupsMon.exe) leading to trivial Local Privilege Escalation
Vexday Risk Score
28Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 9.3EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
26 Nov 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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
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
Affected products
MegaTec Taiwan · UPSilon2000V6.0Want to know if your infrastructure is exposed to this?
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