How severe is CVE-2026-28540?

CVE-2026-28540 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-28540 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28540?

CVE-2026-28540 primarily affects Huawei Harmonyos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-28540?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-28540 have an EU (EUVD) identifier?

Yes. CVE-2026-28540 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9801.

When was CVE-2026-28540 published?

CVE-2026-28540 was published on 2026-03-05 and last updated on 2026-06-17.

CVE-2026-28540

CVE-2026-28540 is a medium-severity vulnerability in Huawei Harmonyos with a CVSS 3.x base score of 4.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Medium (CVSS 3.x base score 4.0)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9801
Weakness: CWE-125
Affected product: Huawei Harmonyos
Published: 2026-03-05
Last modified: 2026-06-17

Description

Out-of-bounds character read vulnerability in Bluetooth. Impact: Successful exploitation of this vulnerability may affect service confidentiality.

Frequently asked questions

What is CVE-2026-28540?: Out-of-bounds character read vulnerability in Bluetooth. Impact: Successful exploitation of this vulnerability may affect service confidentiality.
How severe is CVE-2026-28540?: CVE-2026-28540 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-28540 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28540?: CVE-2026-28540 primarily affects Huawei Harmonyos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-28540?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-28540 have an EU (EUVD) identifier?: Yes. CVE-2026-28540 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9801.
When was CVE-2026-28540 published?: CVE-2026-28540 was published on 2026-03-05 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:huawei:harmonyos:5.1.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:harmonyos:6.0.0:*:*:*:*:*:*:*

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