What is CVE-2026-21228?

CVE-2026-21228 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Azure Local Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-21228 cover?

CVE-2026-21228 covers the following CVE IDs: CVE-2026-21228. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-21228?

CVE-2026-21228 has a CVSS v3 base score of 8.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-21228?

CVE-2026-21228 affects 1 product, including: Azure Local.

CVE-2026-21228HighCVSS 8.1

Azure Local Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

February 10, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-21228 →

📋 Description

Improper certificate validation in Azure Local allows an unauthorized attacker to execute code over a network.

🎯 Affected products1

Azure Local

✅ Remediation

KBRelease Notes (Security Update) — fixed build 2510.0.3002

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21228
patchhttps://aka.ms/ConfiguratorAppForHCI
referencehttps://learn.microsoft.com/en-us/azure/azure-local/deploy/deployment-without-azure-arc-gateway?view=azloc-2601&tabs=app&pivots=register-proxy