How severe is CVE-2026-21224?

CVE-2026-21224 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-21224 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21224?

CVE-2026-21224 affects Microsoft Azure Connected Machine Agent. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21224?

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.

Does CVE-2026-21224 have an EU (EUVD) identifier?

Yes. CVE-2026-21224 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2110.

When was CVE-2026-21224 published?

CVE-2026-21224 was published on 2026-01-13 and last updated on 2026-06-17.

CVE-2026-21224

CVE-2026-21224 is a high-severity vulnerability in Microsoft Azure Connected Machine Agent with a CVSS 3.x base score of 7.8. 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-121.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2110
Weakness: CWE-121
Affected product: Microsoft Azure Connected Machine Agent
Published: 2026-01-13
Last modified: 2026-06-17

Description

Stack-based buffer overflow in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.

Frequently asked questions

What is CVE-2026-21224?: Stack-based buffer overflow in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-21224?: CVE-2026-21224 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-21224 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21224?: CVE-2026-21224 affects Microsoft Azure Connected Machine Agent. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21224?: 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.
Does CVE-2026-21224 have an EU (EUVD) identifier?: Yes. CVE-2026-21224 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2110.
When was CVE-2026-21224 published?: CVE-2026-21224 was published on 2026-01-13 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21224

Affected products (1)

cpe:2.3:a:microsoft:azure_connected_machine_agent:*:*:*:*:*:*:*:*

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