CVE-2021-47705
NoneCVSS
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EPSS
0.5%
Published
Dec 9, 2025
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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