What is CVE-2026-58529?

CVE-2026-58529 is a high-severity vulnerability in Microsoft Windows 11 Version 26h1, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-07-14.

How severe is CVE-2026-58529?

High severity. CVSS v3 base score is 7.1 out of 10.

Out-of-bounds Read in Microsoft Windows 11 Version 26h1

CVE-2026-58529

Out-of-bounds read in Active Directory Federation Services (AD FS) allows an authorized attacker to disclose information over a network.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L.

Affected products

Microsoft Windows 11 Version 26h1 — versions 10.0.28000.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

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

Frequently asked questions

What is CVE-2026-58529?: CVE-2026-58529 is a high-severity vulnerability in Microsoft Windows 11 Version 26h1, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-07-14.
How severe is CVE-2026-58529?: High severity. CVSS v3 base score is 7.1 out of 10.