CVE-2026-120336
Received Received - Intake

Stack-Based Buffer Overflow in VStarcam O-KAM Client

Publication date: 2026-11-02

Last updated on: 2026-11-02

Assigner: VulDB

Description
A vulnerability was found in VStarcam O-KAM Client 1.3.3.32. Affected by this vulnerability is the function FUN_10003EA0 in the library DevDll_925.dll. The manipulation results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

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Meta Information

Published
2026-11-02
Last Modified
2026-11-02
Generated
2026-11-02
AI Q&A
2026-11-02
EPSS Evaluated
N/A
NVD
CVE-2026-120336

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
VStarcam O-KAM Client 1.3.3.32

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

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Executive Summary

CVE-2026-120336 is a stack-based buffer overflow in VStarcam O-KAM Client 1.3.3.32. The vulnerability exists in the function FUN_10003EA0 within DevDll_925.dll. Attackers can exploit it by sending malicious P2P SetDeviceInfo messages containing oversized strings (IP address, authentication data, prefix, or serial number). The unsafe lstrcpyA function copies these strings into fixed-size stack buffers without length checks, allowing attackers to overwrite critical stack data like the return address and gain full EIP control.

Detection Guidance

Monitor network traffic for malformed P2P SetDeviceInfo messages containing unusually long strings in IP address, authentication data, prefix, or serial number fields. Check for crashes in VStarcam O-KAM Client processes with STATUS_STACK_BUFFER_OVERRUN errors.

Impact Analysis

This vulnerability allows remote attackers to execute arbitrary code on your system by sending specially crafted network messages. Since exploitation requires no authentication or user interaction, any device running the vulnerable VStarcam O-KAM Client could be compromised if connected to a malicious P2P network or exposed to network traffic. The attack can crash the application or lead to full system compromise.

Compliance Impact

This vulnerability, a stack-based buffer overflow in VStarcam O-KAM Client, could lead to unauthorized code execution or data breaches. For GDPR, it may result in unauthorized access to personal data, violating confidentiality and integrity requirements. For HIPAA, it could expose protected health information if exploited in healthcare environments. Both standards require safeguards against such vulnerabilities to protect sensitive data.

Mitigation Strategies

Isolate affected systems from untrusted networks, disable P2P functionality if possible, and apply vendor patches if available. Monitor for exploit attempts and block suspicious traffic patterns.

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