Security readout for executives and security teams
Plain-English summary
This issue affects the AMS module in listed Huawei mobile OS versions. It is an improper permission control flaw that may cause non-system application processes to crash. The public record does not provide CVSS, active exploitation evidence, or impact beyond process crashes, so treat it primarily as an availability risk for affected Huawei endpoints.
Executive priority
Handle through normal mobile endpoint patch management unless affected Huawei devices support critical business workflows. There is no sourced evidence of active exploitation or severe confidentiality impact, but the lack of CVSS and fixed-build detail means asset inventory and vendor update confirmation matter.
Technical view
CVE-2021-46787 is an improper permission control vulnerability in Huawei's AMS module affecting HarmonyOS 2.0, EMUI 10.1.x, 11.0.x, 12.0.0, and Magic UI 3.1.x, 4.0.0. Public metadata does not identify a CWE, CVSS vector, privilege prerequisites, attack vector, or exact fixed builds.
Likely exposure
Exposure is limited to organizations using Huawei devices running the affected HarmonyOS, EMUI, or Magic UI versions. The sources do not indicate exposure for non-Huawei platforms, server systems, or other Huawei product lines.
Exploitation context
The CVE record says successful exploitation may crash non-system application processes. It is not listed in KEV, and the supplied sources do not state active exploitation, public exploit availability, or exploitation prerequisites.
Researcher notes
The public description is sparse. Key missing details include attack vector, required privileges, user interaction, exact permission boundary, CWE, CVSS scoring, and fixed firmware identifiers. Avoid assuming remote exploitability or privilege escalation from the available sources.
Mitigation direction
- Review Huawei's May 2022 security bulletin for device-specific update guidance.
- Update affected Huawei devices to vendor-supported fixed firmware when available.
- Prioritize managed Huawei endpoints that run affected OS versions.
- Monitor Huawei advisories for additional remediation or fixed-build details.
Validation and detection
- Inventory Huawei devices and record HarmonyOS, EMUI, or Magic UI versions.
- Compare installed versions against the affected version list in the CVE record.
- Confirm whether May 2022 or later Huawei security updates are installed.
- Track user reports of unexplained non-system application crashes on affected devices.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-46787 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://consumer.huawei.com/en/support/bulletin/2022/5/CVE reference · x_refsource_MISC
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-phones-202205-0000001245813162CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.