What is CVE-2026-42822?

CVE-2026-42822 is a critical-severity vulnerability in Microsoft Azure Local, classified under Improper Authentication. CVSS score: 10.0/10. Published 2026-05-18.

How severe is CVE-2026-42822?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Auth bypass in Microsoft Azure Local

CVE-2026-42822

Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges over a network.

Vulnerability class: Broken Authentication

Published 2026-05-18 · last modified 2026-10-14.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (42.4th percentile), scored 2026-11-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.005 · change: -0.004

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42822 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42822?: CVE-2026-42822 is a critical-severity vulnerability in Microsoft Azure Local, classified under Improper Authentication. CVSS score: 10.0/10. Published 2026-05-18.
How severe is CVE-2026-42822?: Critical severity. CVSS v3 base score is 10.0 out of 10.