CVE-2026-58529: CWE-125: Out-of-bounds Read in Microsoft Windows 11 version 26H1
Out-of-bounds read in Active Directory Federation Services (AD FS) allows an authorized attacker to disclose information over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-58529) involves an out-of-bounds read in Active Directory Federation Services (AD FS) on Windows 11 version 26H1 (build 10.0.28000.0). The flaw permits an attacker with authorized access to cause information disclosure remotely over a network. The CVSS v3.1 base score is 7.1, indicating high severity, with a network attack vector, low attack complexity, and no user interaction required. Microsoft has released an official fix to address this issue.
Potential Impact
An authorized attacker can exploit this vulnerability to read memory outside the intended bounds in AD FS, potentially disclosing sensitive information over the network. The integrity and availability of the system are not impacted, but confidentiality is rated high.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58529 to remediate this vulnerability.
CVE-2026-58529: CWE-125: Out-of-bounds Read in Microsoft Windows 11 version 26H1
Description
Out-of-bounds read in Active Directory Federation Services (AD FS) allows an authorized attacker to disclose information over a network.
CVSS v3.1
Score 7.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-58529) involves an out-of-bounds read in Active Directory Federation Services (AD FS) on Windows 11 version 26H1 (build 10.0.28000.0). The flaw permits an attacker with authorized access to cause information disclosure remotely over a network. The CVSS v3.1 base score is 7.1, indicating high severity, with a network attack vector, low attack complexity, and no user interaction required. Microsoft has released an official fix to address this issue.
Potential Impact
An authorized attacker can exploit this vulnerability to read memory outside the intended bounds in AD FS, potentially disclosing sensitive information over the network. The integrity and availability of the system are not impacted, but confidentiality is rated high.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58529 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-01T04:33:41.869Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58529","vendor":"Microsoft"}]
Threat ID: 6a5676c068715ace43f0b130
Added to database: 07/14/2026, 17:49:52 UTC
Last enriched: 07/14/2026, 18:24:11 UTC
Last updated: 07/15/2026, 03:37:22 UTC
Views: 14
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