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Description

COMMAX WebViewer ActiveX Control 2.1.4.5 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by providing excessively long string arrays through multiple functions. Attackers can exploit boundary errors in Commax_WebViewer.ocx to cause buffer overflow conditions and potentially gain code execution.

PUBLISHED Reserved 2025-12-05 | Published 2025-12-09 | Updated 2025-12-12 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-787: Out-of-bounds Write

Product status

Default status
unaffected

2.1.4.5
affected

Credits

LiquidWorm as Gjoko Krstic of Zero Science Lab finder

References

www.exploit-db.com/exploits/50231 (ExploitDB-50231) exploit

www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5663.php (Zero Science Lab Disclosure (ZSL-2021-5663)) third-party-advisory

www.commax.com (Reference) product

www.vulncheck.com/...ol-commax-webviewer-ocx-buffer-overflow (VulnCheck Advisory: CNC_Ctrl DllUnregisterServer f5501 Access Violation) third-party-advisory

cve.org (CVE-2021-47719)

nvd.nist.gov (CVE-2021-47719)

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