Information Disclosure in Active Directory Federation Services by Microsoft
CVE-2026-58529

7.1HIGH

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 26h1
Vendor
CVE Published:
14 July 2026

What is CVE-2026-58529?

An out-of-bounds read vulnerability exists in Active Directory Federation Services (AD FS), which may allow an authorized attacker to gain unauthorized access to sensitive information over the network. Exploiting this flaw can lead to potential data exposure, compromising user privacy and system integrity. Organizations are urged to apply necessary patches and mitigations to safeguard against this risk.

Affected Version(s)

Windows 11 version 26H1 ARM64-based Systems 10.0.28000.0 < 10.0.28000.2525

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.