Buffer overflow in Redragon Bm-4091
CVE-2021-47786
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (40.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50322 (Exploit, Third Party Advisory, exploit)
- www.redragonzone.com/ (Product, product)
- github.com/Quadron-Research-Lab/Kernel_Driver_bugs/tree/main/REDRAGON_MOUSE (Exploit, technical-description, exploit)
- www.vulncheck.com/advisories/redragon-gaming-mouse-redragonmousesys-denial-of-s… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2021-47786?
- CVE-2021-47786 is a high-severity vulnerability in Redragon Bm-4091, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-01-16.
- How severe is CVE-2021-47786?
- High severity. CVSS v3 base score is 7.5 out of 10.