What is CVE-2026-42834?

CVE-2026-42834 is a high-severity vulnerability in Microsoft Windows_admin_center, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2026-05-20.

How severe is CVE-2026-42834?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Microsoft Windows_admin_center

CVE-2026-42834

Improper access control in Windows Admin Center allows an authorized attacker to elevate privileges over a network.

EPSS: 0.000 (7.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Microsoft Windows_admin_center
Microsoft Windows Admin Center In Azure Portal — versions 1.0

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42834?: CVE-2026-42834 is a high-severity vulnerability in Microsoft Windows_admin_center, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2026-05-20.
How severe is CVE-2026-42834?: High severity. CVSS v3 base score is 7.8 out of 10.