Buffer Overrun Vulnerability in Yenkee Hornet Gaming Mouse Driver
CVE-2021-47789

6.8MEDIUM

Key Information:

Vendor: Yenkee
Status: Yenkee Hornet Gaming Mouse
Vendor: CVE Published:; 15 January 2026

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👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47789?

The Yenkee Hornet Gaming Mouse driver, GM312Fltr.sys, is susceptible to a buffer overrun vulnerability that can lead to a system crash. This vulnerability enables attackers to exploit the driver's functionality by sending oversized input (up to 2000 bytes) via the DeviceIoControl API. When the oversized buffer is processed, the system can experience a denial of service due to a kernel-level crash, affecting the stability and usability of the system. Users are advised to take preventive measures and keep their drivers updated.

Affected Version(s)

Yenkee Hornet Gaming Mouse all version

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47789 - Proof of Concept