Microsoft QUIC Information Disclosure Vulnerability

HighVendor CVSS 7.5 / 10 1 CVE Published Aug 11, 2026 at 7:00 AM UTC

Summary

Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.

Install KB5122106. Install KB5122105. Install KB5122104.

Update history

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Aug 11, 2026 at 7:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Aug 13, 2026 at 7:00 AM UTC
Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
Aug 20, 2026 at 6:50 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Oct 28, 2026 at 3:45 AM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Details collected from Microsoft Security Response Center.

Official bulletin How SecurityAlert builds this record

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