CVE-2021-26943 Privilege escalation in n/a
An attacker with ring 0 privileges can overwrite SMRAM and execute arbitrary code in System Management Mode on ASUS laptops.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26943?
CVE-2021-26943 is a high-severity vulnerability in n/a, published on 31 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The UX360CA BIOS through 303 on ASUS laptops allow an attacker (with the ring 0 privilege) to overwrite nearly arbitrary physical memory locations, including SMRAM, and execute arbitrary code in the SMM (issue 3 of 3).
Which versions are affected by CVE-2021-26943?
It affects 1 product.
Products include Asus Ux360ca Bios.
How do I fix CVE-2021-26943?
No fix has been published for CVE-2021-26943 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-26943 being exploited?
There is no known exploitation of CVE-2021-26943 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-mjx5-gc25-3cxf.