What’s Vulnerable › Vulnerabilities

CVE-2021-28685

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-08 · updated 2026-06-17

Description

AsIO2_64.sys and AsIO2_32.sys in ASUS GPUTweak II before 2.3.0.3 allow low-privileged users to interact directly with physical memory (by calling one of several driver routines that map physical memory into the virtual address space of the calling process) and to interact with MSR registers. This could enable low-privileged users to achieve NT AUTHORITY\SYSTEM privileges via a DeviceIoControl.

Affected products

• ASUS Gputweak Ii: before 2.3.0.3 — fixed in 2.3.0.3

How to fix

Upgrade to a fixed version: ASUS Gputweak Ii 2.3.0.3. Check the vendor advisory for mitigations.

References

• https://gist.github.com/DStraghkov/fba4994ac4bb3a6e2940b21743563df0
• https://www.asus.com/Static_WebPage/ASUS-Product-Security-Advisory/
• https://gist.github.com/DStraghkov/fba4994ac4bb3a6e2940b21743563df0
• https://www.asus.com/Static_WebPage/ASUS-Product-Security-Advisory/

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