Security readout for executives and security teams
Plain-English summary
CVE-2021-46882 is a Huawei HarmonyOS and EMUI video framework flaw where arithmetic overflow can cause memory overwrite. The documented impact is availability loss, so the business risk is device or service disruption rather than confirmed data theft or privilege gain.
Executive priority
Treat as a high-priority mobile platform availability issue where affected Huawei devices support business operations. Escalate patch verification, but avoid emergency assumptions unless new evidence shows exploitation or broader impact.
Technical view
The record describes an addition-overflow issue in the video framework leading to memory overwriting, classified as CWE-120. CVSS 3.1 is 7.5: network reachable, low complexity, no privileges or user interaction, unchanged scope, and high availability impact only.
Likely exposure
Exposure is limited to Huawei devices running HarmonyOS 2.1.0, 2.0.1, 2.0.0 or EMUI 12.0.1, 12.0.0, 11.0.0, 10.1.1, 10.1.0, based on the source bundle.
Exploitation context
The bundle does not cite active exploitation, and KEV is false. Public evidence provided supports a denial-of-service style availability concern, not confirmed code execution, data exposure, or in-the-wild abuse.
Researcher notes
Evidence is sparse: the bundle names the video framework, addition overflow, memory overwrite, CWE-120, affected versions, and availability impact. It does not provide root-cause detail, attack prerequisites beyond CVSS, affected components, exploit status, or fixed build identifiers.
Mitigation direction
- Check Huawei's May 2023 security bulletin for device-specific guidance.
- Update affected Huawei devices through official Huawei support or management channels.
- Prioritize unsupported or externally exposed mobile fleets for replacement or isolation review.
- Monitor Huawei advisories for any revised affected versions or fixed builds.
Validation and detection
- Inventory Huawei HarmonyOS and EMUI versions across managed devices.
- Compare device versions against the affected version list in the CVE bundle.
- Confirm whether Huawei security updates addressing this CVE are installed.
- Track remediation status for devices that cannot receive vendor updates.
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.
CWE-120: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-46882 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://consumer.huawei.com/en/support/bulletin/2023/5/CVE reference
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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.