CVE-2021-46867Network attack vector

Memory disclosure via HW_KEYMASTER out-of-bounds read

Published Jan 6, 2023 · Updated Apr 10, 2025

Out-of-bounds read in Huawei HarmonyOS 2.0 and EMUI 12.0.0 allows remote attackers to read memory through HW_KEYMASTER. The HW_KEYMASTER module fails to release memory correctly and accesses data beyond its intended bounds; Huawei has not disclosed the affected function or request format. The published assessment requires no privileges or user interaction and limits the reported consequence to confidentiality exposure.

CVSS severity7.5
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Huawei HarmonyOS 2.0 and EMUI 12.0.0 allows remote attackers to read memory through HW_KEYMASTER. The HW_KEYMASTER module fails to release memory correctly and accesses data beyond its intended bounds; Huawei has not disclosed the affected function or request format. The published assessment requires no privileges or user interaction and limits the reported consequence to confidentiality exposure.

The record

CVE
CVE-2021-46867
Published
Jan 6, 2023
Updated
Apr 10, 2025
Vendor
MindSpore
Product
HarmonyOS
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MindSpore · HarmonyOSversion=2.0
MindSpore · EMUIversion=12.0.0

Published CVSS scores

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

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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