Authenticated information disclosure via out-of-bounds read
Published Jul 14, 2026 · Updated Jul 14, 2026
Out-of-bounds read in Microsoft AD FS on Windows 11 version 26H1 allows remote authenticated users to disclose information over a network. Microsoft has not published the affected code path or explained which untrusted input causes a read beyond its buffer boundary. Low-privilege network access is required, and the documented consequence is disclosure of information from the AD FS process.
Summary
What happened
Out-of-bounds read in Microsoft AD FS on Windows 11 version 26H1 allows remote authenticated users to disclose information over a network. Microsoft has not published the affected code path or explained which untrusted input causes a read beyond its buffer boundary. Low-privilege network access is required, and the documented consequence is disclosure of information from the AD FS process.
The record
- CVE
- CVE-2026-58529
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Windows 11, version 26H1
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.28000.0 <10.0.28000.2525
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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