Command Injection in Azure Compute Gallery / Microsoft ACI Confidential Containers
CVE-2026-21522 is a Critical elevation-of-privilege vulnerability affecting Azure Compute Gallery, also described in the provided sources as impacting Microsoft ACI Confidential Containers. The issue is explicitly described as improper neutralization of special elements used in a command, i.e., a command injection flaw. Successful exploitation allows an authorized attacker to elevate privileges locally. Based on the available content, the vulnerable implementation accepts attacker-controlled input that is incorporated into command execution without sufficient sanitization or neutralization. No further technical detail about the specific function, code path, or execution context is provided in the supplied material.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical elevation of privilege vulnerability affecting Microsoft ACI Confidential Containers that undermines the security guarantees of confidential container workloads.
A privilege escalation vulnerability affecting Microsoft ACI Confidential Containers.
A vulnerability affecting Azure Compute Gallery; specific impact type not provided in the content.
A critical elevation of privilege vulnerability affecting Azure Compute Gallery / ACI Confidential Containers, enabling privilege escalation in container environments.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.