Vulnerability · CVE-2026-21522
Improper neutralization of special elements used in a command ('command injection') in Azure Compute Gallery allows an authorized attacker to elevate privileges locally.
Published Feb 10, 2026 · catalog updated Aug 19, 2026 · Microsoft Microsoft ACI Confidential Containers
Last checked Nov 6, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-21522. EPSS is 0.44%. Act only if a listed version of Microsoft Microsoft ACI Confidential Containers is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-23655 · Medium
- Severity
- Medium6.7
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.44%
- Remediation
- Version ranges on file
- Affected products
- vendor Microsoft Microsoft ACI Confidential Containers 1.0.0 <1.2.8
Improper neutralization of special elements used in a command ('command injection') in Azure Compute Gallery allows an authorized attacker to elevate privileges locally.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Microsoft Microsoft ACI Confidential Containers 1.0.0 <1.2.81.0.0 <1.2.8
How to fix CVE-2026-21522
Upgrade
CVE-2026-21522 lists a fix boundary at 1.2.8. Compare the installed build with that boundary before you change production.
Version check
Seen in 1.0.0 <1.2.8
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-21522. EPSS is 0.44%. Act only if a listed version of Microsoft Microsoft ACI Confidential Containers is installed.
Which versions are affected?
Compare what you have installed with Microsoft Microsoft ACI Confidential Containers 1.0.0 <1.2.8 1.0.0 <1.2.8. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.44%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Feb 10, 2026 · EUVD
Detected
Improper neutralization of special elements used in a command ('command injection') in Azure Compute Gallery allows an authorized attacker to elevate privileges locally.
Aug 19, 2026 · EUVD
Updated
Improper neutralization of special elements used in a command ('command injection') in Azure Compute Gallery allows an authorized attacker to elevate privileges locally.
Sources
- CVE.orgVulnerability recordCVE-2026-21522
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-21522
30-day exploitation probability 0.44%
first.org - EUVDVulnerability recordEUVD-2026-7341
Improper neutralization of special elements used in a command ('command injection') in Azure Compute Gallery allows an authorized attacker to elevate privileges locally.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSNov 6, 2026
- CVE.orgNov 4, 2026
- EUVDNov 2, 2026