AI and data stack advisories

Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

MicrosoftCVE-2026-62820

Microsoft Windows DNS: race condition

Microsoft

CVE-2026-62820 · Published Aug 11, 2026 · updated Sep 2, 2026

High8.1
Fix: upgrade to 10.0.14393.9418 or later (4 fixed versions below)
Microsoft advisory

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DNS allows an unauthorized attacker to execute code over a network.

Affected versions

PackageAffectedFixed in
Windows Server 2016
Product
>= 10.0.14393.0, < 10.0.14393.941810.0.14393.9418
Windows Server 2016 (Server Core installation)
Product
>= 10.0.14393.0, < 10.0.14393.941810.0.14393.9418
Windows Server 2019
Product
>= 10.0.17763.0, < 10.0.17763.912110.0.17763.9121
Windows Server 2019 (Server Core installation)
Product
>= 10.0.17763.0, < 10.0.17763.912110.0.17763.9121
Windows Server 2022
Product
>= 10.0.20348.0, < 10.0.20348.549910.0.20348.5499
Windows Server 2025
Product
>= 10.0.26100.0, < 10.0.26100.3329610.0.26100.33296
Windows Server 2025 (Server Core installation)
Product
>= 10.0.26100.0, < 10.0.26100.3329610.0.26100.33296
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-362

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