What is CVE-2026-21522?

CVE-2026-21522 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-21522 cover?

CVE-2026-21522 covers the following CVE IDs: CVE-2026-21522. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-21522?

CVE-2026-21522 has a CVSS v3 base score of 6.7, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-21522?

CVE-2026-21522 affects 1 product, including: Microsoft ACI Confidential Containers.

CVE-2026-21522CriticalCVSS 6.7

Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

February 10, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-21522 →

📋 Description

Improper neutralization of special elements used in a command ('command injection') in Azure Compute Gallery allows an authorized attacker to elevate privileges locally.

🎯 Affected products1

Microsoft ACI Confidential Containers

✅ Remediation

KBRelease Notes (Security Update) — fixed build 1.2.8

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21522
patchhttps://learn.microsoft.com/en-us/cli/azure/azure-cli-extensions-overview
referencehttps://github.com/Azure/azure-cli-extensions/pull/9238