Description
COMMAX UMS Client ActiveX Control 1.7.0.2 contains a heap-based buffer overflow vulnerability that allows attackers to execute arbitrary code by providing excessively long string arrays through multiple functions. Attackers can exploit improper boundary validation in CNC_Ctrl.dll to cause heap corruption and potentially gain system-level access.
Published: 2025-12-09
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 10 Dec 2025 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Commax
Commax ums Client Activex Control
Vendors & Products Commax
Commax ums Client Activex Control

Wed, 10 Dec 2025 16:30:00 +0000


Wed, 10 Dec 2025 16:00:00 +0000


Tue, 09 Dec 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 09 Dec 2025 20:45:00 +0000

Type Values Removed Values Added
Description COMMAX UMS Client ActiveX Control 1.7.0.2 contains a heap-based buffer overflow vulnerability that allows attackers to execute arbitrary code by providing excessively long string arrays through multiple functions. Attackers can exploit improper boundary validation in CNC_Ctrl.dll to cause heap corruption and potentially gain system-level access.
Title CNC_Ctrl DllUnregisterServer Access Violation
Weaknesses CWE-787
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Commax Ums Client Activex Control
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-04-07T14:05:33.344Z

Reserved: 2025-12-05T19:10:29.045Z

Link: CVE-2021-47705

cve-icon Vulnrichment

Updated: 2025-12-09T21:35:13.532Z

cve-icon NVD

Status : Deferred

Published: 2025-12-09T21:15:49.350

Modified: 2026-04-15T00:35:42.020

Link: CVE-2021-47705

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-12-10T21:33:22Z

Weaknesses