CVE-2021-46883Network attack vector

Service interruption via video-framework addition overflow

Published May 26, 2023 · Updated Jan 16, 2025

Memory corruption in Huawei HarmonyOS 2.0.0 through 2.1.0 and EMUI 10.1.0 through 12.0.1 allows remote attackers to interrupt service. An addition overflow in the video framework causes memory to be overwritten, but Huawei has not disclosed the affected function or the input that reaches it. The network path requires neither authentication nor user interaction, and the published impact is limited to availability.

CVSS severity7.5
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Huawei HarmonyOS 2.0.0 through 2.1.0 and EMUI 10.1.0 through 12.0.1 allows remote attackers to interrupt service. An addition overflow in the video framework causes memory to be overwritten, but Huawei has not disclosed the affected function or the input that reaches it. The network path requires neither authentication nor user interaction, and the published impact is limited to availability.

The record

CVE
CVE-2021-46883
Published
May 26, 2023
Updated
Jan 16, 2025
Vendor
MindSpore
Product
HarmonyOS
Classifications
CWE-120, T1642
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0
  2. Affected versionversion=2.0.1
  3. Affected versionversion=2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MindSpore · HarmonyOSversion=2.0.0; version=2.0.1; version=2.1.0
MindSpore · EMUIversion=10.1.0; version=10.1.1; version=11.0.0; version=12.0.0; version=12.0.1

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1642Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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