CVE-2021-39986 Missing authorization in EMUI

Medium 5.5 Published 9 Feb 2022 Updated 4 Aug 2024

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-2021-39986?

CVE-2021-39986 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-2021-39986?

It affects 1 product.

Products include Huawei Emui.

How do I fix CVE-2021-39986?

No fix has been published for CVE-2021-39986 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-2021-39986 being exploited?

There is no known exploitation of CVE-2021-39986 in the wild and no public exploit code.

All Huawei Emui vulnerabilities

Sources

Also known as GHSA-q745-q679-hh85.