CVE-2021-47786 Redragon Gaming Mouse - 'REDRAGON_MOUSE.sys' Denial of Service (PoC)
Attackers can crash the kernel driver by sending malformed IOCTL requests to the Redragon Gaming Mouse device, causing a system denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47786?
CVE-2021-47786 is a medium-severity denial of service vulnerability in Redragon Gaming Mouse, published on 15 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Redragon Gaming Mouse driver contains a kernel-level vulnerability that allows attackers to trigger a denial of service by sending malformed IOCTL requests. Attackers can send a crafted 2000-byte buffer with specific byte patterns to the REDRAGON_MOUSE device to crash the kernel driver.
Weakness: CWE-787
Which versions are affected by CVE-2021-47786?
It affects 14 products.
Products include Redragon Bm-4091 Firmware, Redragon M602-Ks Firmware, Redragon M602a-Rgb Firmware, Redragon M602aw-Rgb Firmware, Redragon M617-Lit Firmware, Redragon M712-Rgb Firmware and 8 more.
How do I fix CVE-2021-47786?
No fix has been published for CVE-2021-47786 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-47786 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47786 exists.
Sources
Also known as GHSA-hf7c-3q9p-mcqw.