CVE-2021-39991 Missing authorization in EMUI
An unauthorized rewriting vulnerability in the ACPU memory access module allows attackers to compromise service confidentiality on Huawei EMUI devices.
- 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-2021-39991?
CVE-2021-39991 is a medium-severity missing authorization vulnerability in Huawei Emui, published on 9 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
There is an unauthorized rewriting vulnerability with the memory access management module on ACPU.Successful exploitation of this vulnerability may affect service confidentiality.
Which versions are affected by CVE-2021-39991?
It affects 1 product.
Products include Huawei Emui.
How do I fix CVE-2021-39991?
No fix has been published for CVE-2021-39991 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-39991 being exploited?
There is no known exploitation of CVE-2021-39991 in the wild and no public exploit code.
Other vulnerabilities in Huawei Emui
Sources
Also known as GHSA-w5fm-h2vx-gp8q.