CVE-2026-28540

Local service-data disclosure via Bluetooth out-of-bounds read

Published Mar 5, 2026 · Updated Mar 5, 2026

Out-of-bounds read in Bluetooth in Huawei HarmonyOS 5.1.0 and 6.0.0 allows local users to disclose service data. Huawei identifies improper neutralization of a NUL character but has not disclosed the Bluetooth code locus, input path, or operation that reads beyond its intended boundary. Exploitation requires local access, needs no privileges or user interaction under Huawei's assessment, and affects confidentiality without reported integrity or availability impact.

CVSS severity4.0
Medium
EPSS probability0.08%
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 Bluetooth in Huawei HarmonyOS 5.1.0 and 6.0.0 allows local users to disclose service data. Huawei identifies improper neutralization of a NUL character but has not disclosed the Bluetooth code locus, input path, or operation that reads beyond its intended boundary. Exploitation requires local access, needs no privileges or user interaction under Huawei's assessment, and affects confidentiality without reported integrity or availability impact.

The record

CVE
CVE-2026-28540
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
MindSpore
Product
HarmonyOS
Classifications
CWE-125, CWE-158
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2026Record 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=5.1.0
  2. Affected versionversion=6.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

MindSpore · HarmonyOSversion=5.1.0; version=6.0.0

Published CVSS scores

4.0Huawei TechnologiesCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-158Improper Neutralization of Null Byte or NUL Character

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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