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Microsoft Security Response CenterCVE-2026-62902

.NET Information Disclosure Vulnerability

HighVendor CVSS 6.5 / 10 1 CVE Published Aug 11, 2026 at 7:00 AM UTC

Summary

Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to disclose information over a network.

Products covered

  • .NET 8.0 installed on Windows

  • .NET 9.0 installed on Windows

  • Microsoft Visual Studio 2022 version 17.14

  • Microsoft Visual Studio 2026 version 18.8

Remediation

Install KB5122104. Install KB5122105.

Vendor-listed fixes

  • 8.0.30

  • 9.0.19

  • 17.14.38

  • 18.8.3

CVEs in this advisory 1

Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed its remediation guidance.

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.