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, identified as CWE-125 (Out-of-bounds Read), affects Active Directory Federation Services in Microsoft Windows 11 version 26H1 (build 10.0.28000.0). It permits an attacker with authorized access to cause an out-of-bounds read condition, potentially leading to information disclosure over the network. The CVSS v3.1 base score is 7.1, indicating high severity, with an attack vector of network, low attack complexity, and requiring privileges but no user interaction. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker can exploit this vulnerability to disclose sensitive information over the network. The integrity of the system is not affected, but confidentiality is impacted with high severity. Availability impact is low. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users and administrators should apply the provided security update from the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58529 to remediate this issue.
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, identified as CWE-125 (Out-of-bounds Read), affects Active Directory Federation Services in Microsoft Windows 11 version 26H1 (build 10.0.28000.0). It permits an attacker with authorized access to cause an out-of-bounds read condition, potentially leading to information disclosure over the network. The CVSS v3.1 base score is 7.1, indicating high severity, with an attack vector of network, low attack complexity, and requiring privileges but no user interaction. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker can exploit this vulnerability to disclose sensitive information over the network. The integrity of the system is not affected, but confidentiality is impacted with high severity. Availability impact is low. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users and administrators should apply the provided security update from the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58529 to remediate this issue.
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: 08/13/2026, 16:00:40 UTC
Last updated: 08/27/2026, 22:52:12 UTC
Views: 84
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