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Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

MicrosoftCVE-2026-69858

Microsoft Windows DNS: use after free

Microsoft

CVE-2026-69858 · Published Sep 8, 2026 · updated Sep 16, 2026

High8.1
Fix: upgrade to 10.0.20348.5622 or later (3 fixed versions below)
Microsoft advisory

Use after free in Windows DNS allows an unauthorized attacker to execute code over a network.

Affected versions

PackageAffectedFixed in
Windows Server 2022
Product
>= 10.0.20348.0, < 10.0.20348.562210.0.20348.5622
Windows Server 2025
Product
>= 10.0.26100.0, < 10.0.26100.3343810.0.26100.33438
Windows Server 2025 (Server Core installation)
Product
>= 10.0.26100.0, < 10.0.26100.3343810.0.26100.33438
Details and references
CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-416

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