MegaTec UPSilon2000 6.0.5 RupsMon.exe privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in MegaTec UPSilon2000 6.0.5. Affected by this vulnerability is an unknown functionality of the file RupsMon.exe. The manipulation results in privileges management. This vulnerability is cataloged as CVE-2025-66266. The attack must be initiated from a local position. There is no exploit available.

Detailsinfo

A vulnerability was found in MegaTec UPSilon2000 6.0.5. It has been classified as critical. Affected is an unknown function of the file RupsMon.exe. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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

The weakness was shared by Abdul Mhanni. The advisory is shared for download at megatec.com.tw. This vulnerability is traded as CVE-2025-66266 since 11/26/2025. The exploitability is told to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202511-2919). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

11/26/2025 Advisory disclosed
11/26/2025 +0 days CVE reserved
11/26/2025 +0 days VulDB entry created
11/27/2025 +1 days VulDB entry last update

Sourcesinfo

Advisory: megatec.com.tw
Researcher: Abdul Mhanni
Status: Not defined

CVE: CVE-2025-66266 (🔒)
GCVE (CVE): GCVE-0-2025-66266
GCVE (VulDB): GCVE-100-333564
CNNVD: CNNVD-202511-2919 - MegaTec UPSilon2000 安全漏洞

Entryinfo

Created: 11/26/2025 06:44
Updated: 11/27/2025 23:07
Changes: 11/26/2025 06:44 (66), 11/27/2025 23:07 (6)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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