CVE-2021-46891
CWE-200Published: July 5, 2023· Updated: Jun 17, 2026
Official Description
Vulnerability of incomplete read and write permission verification in the GPU module. Successful exploitation of this vulnerability may affect service confidentiality, integrity, and availability.
Risk Analysis
The GPU module in certain Huawei devices suffers from incomplete read and write permission verification. This critical flaw allows remote attackers to bypass security controls, potentially leading to full system compromise.
No public exploit is known, and the vulnerability is not in the CISA KEV catalog. It is remotely exploitable with low attack complexity.
Apply the latest security updates released by Huawei for the affected EMUI and HarmonyOS versions.
Technical Analysis
CVE-2021-46891 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (4)
Quick Facts
Related CVEs (CWE-200)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-46891 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts