PT-2025-50243 · Commax · Commax Webviewer Activex Control

Published 2025-12-09 · Updated 2025-12-10 · CVE-2021-47719

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions COMMAX WebViewer ActiveX Control version 2.1.4.5

Description The COMMAX WebViewer ActiveX Control contains a buffer overflow issue. An attacker can execute arbitrary code by supplying overly long string arrays through multiple functions. Specifically, boundary errors within Commax WebViewer.ocx can lead to buffer overflow conditions, potentially allowing code execution.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-47719

Affected Products

Commax Webviewer Activex Control

References · 8

• 🔥 https://exploit-db.com/exploits/50231 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-47719 · Security Note
• https://zeroscience.mk/en/vulnerabilities/ZSL-2021-5663.php · Note
• https://vulncheck.com/advisories/cncctrl-dllunregisterserver-f-access-violation · Note
• https://twitter.com/CVEnew/status/1998732797511610387 · Twitter Post
• https://vulncheck.com/advisories/commax-webviewer-activex-control-commax-webviewer-ocx-buffer-overflow · Note
• https://commax.com · Note
• https://t.me/CVEtracker/39287 · Telegram Post