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CVE-2026-21522 · Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability

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

Severity
Critical
Impact
Elevation of Privilege
CVSS
6.7 base · 6.0 temporal
Release
2026-02-10
Signals
Azure Compute Gallery Elevation of Privilege Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
Patch Diff
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Description
Improper neutralization of special elements used in a command ('command injection') in Azure Compute Gallery allows an authorized attacker to elevate privileges locally.
FAQ / Articles
FAQ
What privileges could be gained by an attacker who successfully exploited the vulnerability? An attacker who exploited this vulnerability could execute arbitrary commands within the affected ACI container’s context, allowing them to run code with the same privileges as the compromised container. In confidential‑container scenarios, this could also let an attacker access sensitive secrets or data protected by the attested environment.
Azure Compute Gallery Elevation of Privilege Vulnerability
Improper neutralization of special elements used in a command ('command injection') in Azure Compute Gallery allows an authorized attacker to elevate privileges locally.