Security readout for executives and security teams
Plain-English summary
This flaw affects Huawei device video framework components. A malformed or unexpected video-processing input could trigger memory overwriting through an integer addition overflow, causing service or device availability problems. The public record frames the impact as denial of service, not data theft.
Executive priority
Treat as a high-priority mobile platform patching issue where Huawei devices are used in business workflows. Urgency is driven by remote, no-interaction availability risk, but the provided evidence does not support an emergency active-exploitation claim.
Technical view
CVE-2021-46883 is a high-severity Huawei HarmonyOS and EMUI vulnerability in the video framework. The source describes memory overwriting caused by addition overflow, mapped to CWE-120. CVSS 3.1 is 7.5: network reachable, low complexity, no privileges or user interaction, availability impact only.
Likely exposure
Exposure is limited to listed Huawei HarmonyOS versions 2.1.0, 2.0.1, 2.0.0 and EMUI versions 12.0.1, 12.0.0, 11.0.0, 10.1.1, and 10.1.0. No CPEs or finer product models were provided in the source bundle.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. The CVSS vector indicates remote reachability and no required privileges or interaction, but public evidence here only supports availability impact and does not provide exploit maturity details.
Researcher notes
Public detail is sparse. The record identifies an addition overflow leading to memory overwrite in the video framework and availability impact only. Avoid assuming code execution or confidentiality impact from the provided sources. Validation should focus on version exposure, vendor bulletin status, and crash telemetry.
Mitigation direction
- Review Huawei's May 2023 security bulletin for official remediation guidance.
- Prioritize vendor security updates for affected HarmonyOS and EMUI devices.
- Inventory Huawei mobile devices and map OS versions against the affected list.
- Reduce exposure to untrusted network or media-processing paths where operationally possible.
- Monitor Huawei advisories for any revised affected versions or fixes.
Validation and detection
- Check MDM or asset inventory for the listed HarmonyOS and EMUI versions.
- Confirm each affected device has received applicable Huawei security updates.
- Review incident logs for unexplained video framework crashes or availability events.
- Document devices that cannot be updated and track compensating controls.
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-2021-46883 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.