How severe is CVE-2021-28460?

CVE-2021-28460 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-28460 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28460?

CVE-2021-28460 affects Microsoft Azure Sphere. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28460?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-28460 published?

CVE-2021-28460 was published on 2021-04-13 and last updated on 2026-06-17.

CVE-2021-28460

CVE-2021-28460 is a high-severity vulnerability in Microsoft Azure Sphere with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 4.6
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Azure Sphere
Published: 2021-04-13
Last modified: 2026-06-17

Description

Azure Sphere Unsigned Code Execution Vulnerability

Frequently asked questions

What is CVE-2021-28460?: Azure Sphere Unsigned Code Execution Vulnerability
How severe is CVE-2021-28460?: CVE-2021-28460 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-28460 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28460?: CVE-2021-28460 affects Microsoft Azure Sphere. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28460?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-28460 published?: CVE-2021-28460 was published on 2021-04-13 and last updated on 2026-06-17.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28460

Affected products (1)

cpe:2.3:a:microsoft:azure_sphere:-:*:*:*:*:*:*:*

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