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CVE-2026-21522

Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability

MEDIUM
6.7
CVSS Score
Published: February 10, 2026 at 05:51 PM UTC
Updated: June 17, 2026 at 10:18 AM UTC
2 products affected across 1 vendorConfcomAzure Container Instances

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Severity
MEDIUM6.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Confcom· Microsoft
95%
v < 1.2.8
Azure Container Instances· Microsoft
60%
1.0.0 ≤ v < 1.2.81.0.0
Affected range stops below 1.2.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21522

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.7MEDIUMmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-77

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