CVE-2021-47786: Redragon Bm-4091 Firmware

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Redragon Bm-4091 Firmware: affected versions not specified
• Redragon m602-Ks Firmware: affected versions not specified
• Redragon m602a-Rgb Firmware: affected versions not specified
• Redragon m602aw-Rgb Firmware: affected versions not specified
• Redragon m617-Lit Firmware: affected versions not specified
• Redragon m712-Rgb Firmware: affected versions not specified
• Redragon m721 Firmware: affected versions not specified
• Redragon m725-Lit Firmware: affected versions not specified
• Redragon m801p-Rgb Firmware: affected versions not specified
• Redragon m816-Pro Firmware: affected versions not specified
• Redragon m910-K Firmware: affected versions not specified
• Redragon m910-Ks Firmware: affected versions not specified
• Redragon m914w-Rgb Firmware: affected versions not specified
• Redragon m915rgb-Wl Firmware: affected versions not specified

Published 2026-01-16. Last modified 2026-06-17.