CVE-2025-66266
Insecure SYSTEM Service Permissions in UPSilon2000V6.0 (RupsMon.exe) leading to trivial Local Privilege Escalation
Description
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
INFO
Published Date :
Nov. 26, 2025, 1:16 a.m.
Last Modified :
Nov. 26, 2025, 1:20 a.m.
Remotely Exploit :
No
Source :
Gridware
Affected Products
The following products are affected by CVE-2025-66266
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | CRITICAL | b7efe717-a805-47cf-8e9a-921fca0ce0ce |
Solution
- Restrict 'Everyone' group permissions on RupsMon.exe.
- Ensure only authorized users can modify the executable.
- Apply principle of least privilege to service executables.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-66266 vulnerability anywhere in the article.