CVE-2026-105512: Microsoft QUIC Denial of Service Vulnerability
Microsoft · Windows 11 version 23H2
Vendor fix available · Affected: Microsoft Windows 11 version 23H2 · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 72% of scored CVEs
DescriptionCVE.org
Integer underflow (wrap or wraparound) in Microsoft QUIC allows an unauthorized attacker to deny service over a network.
Affected products9
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Microsoft · Windows 11 version 23H2from 10.0.22631.0 before 10.0.22631.7711
- Microsoft · Windows 11 Version 23H2from 10.0.22631.0 before 10.0.22631.7711
- Microsoft · Windows 11 Version 24H2from 10.0.26100.0 before 10.0.26100.9974
- Microsoft · Windows 11 Version 25H2from 10.0.26200.0 before 10.0.26200.9974
- Microsoft · Windows 11 version 26H1from 10.0.28000.0 before 10.0.28000.3501
- Microsoft · Windows 11 Version 26H2from 10.0.26300.0 before 10.0.26300.9974
- Microsoft · Windows Server 2022from 10.0.20348.0 before 10.0.20348.5870
- Microsoft · Windows Server 2025from 10.0.26100.0 before 10.0.26100.33822
- Microsoft · Windows Server 2025 (Server Core installation)from 10.0.26100.0 before 10.0.26100.33822
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Possible (1 to 10%). EPSS between 1% and 10%.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Microsoft
- Published
- November 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-105512 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.