CVE-2021-37039

Bluetooth service interruption via invalid input

Published Dec 8, 2021 · Updated Aug 4, 2024

Improper input validation in Huawei EMUI 10.1.1 and 11.0.0 and HarmonyOS 2.0 allows physically proximate attackers to interrupt Bluetooth service. Huawei has not published the affected Bluetooth component, input type, or validation operation that mishandles the input. Exploitation requires Bluetooth-range proximity and can deny Bluetooth availability, with no reported confidentiality or integrity impact.

CVSS severity6.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Huawei EMUI 10.1.1 and 11.0.0 and HarmonyOS 2.0 allows physically proximate attackers to interrupt Bluetooth service. Huawei has not published the affected Bluetooth component, input type, or validation operation that mishandles the input. Exploitation requires Bluetooth-range proximity and can deny Bluetooth availability, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2021-37039
Published
Dec 8, 2021
Updated
Aug 4, 2024
Vendor
MindSpore
Product
HarmonyOS
Classifications
CWE-20, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 8, 2021CVE 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?

MindSpore · HarmonyOSversion=2.0
MindSpore · EMUIversion=10.1.1; version=11.0.0

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.3NIST NVDAV:A/AC:L/Au:N/C:N/I:N/A:P

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-20Improper Input Validation
T1499Endpoint 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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