CVE-2021-40002

Remote command execution via Bluetooth out-of-bounds write

Published Jan 7, 2022 · Updated Aug 4, 2024

Heap-based buffer overflow in Huawei HarmonyOS 2.0 allows remote attackers to execute malicious commands via Bluetooth. The Bluetooth module writes beyond an allocated memory boundary while processing attacker-supplied data. Exploitation requires an unauthenticated attacker in Bluetooth range; successful exploitation can execute commands on the remote device.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Huawei HarmonyOS 2.0 allows remote attackers to execute malicious commands via Bluetooth. The Bluetooth module writes beyond an allocated memory boundary while processing attacker-supplied data. Exploitation requires an unauthenticated attacker in Bluetooth range; successful exploitation can execute commands on the remote device.

The record

CVE
CVE-2021-40002
Published
Jan 7, 2022
Updated
Aug 4, 2024
Vendor
Huawei Technologies Co., Ltd.
Product
HarmonyOS
Classifications
CWE-787, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

Huawei Technologies Co., Ltd. · HarmonyOSversion=2.0

Published CVSS scores

5.8NVDAV:A/AC:L/Au:N/C:P/I:P/A:P
8.8NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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No observations available

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

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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