What is CVE-2026-21228?

CVE-2026-21228 is a high-severity vulnerability in Microsoft Azure Local, classified under Improper Certificate Validation. CVSS score: 8.1/10. Published 2026-02-10.

How severe is CVE-2026-21228?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Microsoft Azure Local

CVE-2026-21228

Improper certificate validation in Azure Local allows an unauthorized attacker to execute code over a network.

Vulnerability class: Improper Certificate Validation

EPSS: 0.001 (25.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.

Affected products

Microsoft Azure Local — versions 1.0.0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

Azure Local Remote Code Execution Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-21228?: CVE-2026-21228 is a high-severity vulnerability in Microsoft Azure Local, classified under Improper Certificate Validation. CVSS score: 8.1/10. Published 2026-02-10.
How severe is CVE-2026-21228?: High severity. CVSS v3 base score is 8.1 out of 10.