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Vulnerability · Published Aug 11, 2026 · Assigned by microsoft

CVE-2026-62778Windows DNS Elevation of Privilege Vulnerability

High 8.1

In plain English

A high-severity use-after-free in Windows 10 Version 1607 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.5%top 54.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Use after free in Windows DNS allows an unauthorized attacker to elevate privileges over a network.

Affected products (as reported)

VendorProductVersions
Microsoft Windows 10 Version 1607 10.0.14393.0 – before 10.0.14393.9418
Microsoft Windows 10 Version 1809 10.0.17763.0 – before 10.0.17763.9121
Microsoft Windows Server 2012 6.2.9200.0 – before 6.2.9200.26280
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 – before 6.2.9200.26280
Microsoft Windows Server 2012 R2 6.3.9600.0 – before 6.3.9600.23338
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 – before 6.3.9600.23338
Microsoft Windows Server 2016 10.0.14393.0 – before 10.0.14393.9418
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 – before 10.0.14393.9418
Microsoft Windows Server 2019 10.0.17763.0 – before 10.0.17763.9121
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 – before 10.0.17763.9121
Microsoft Windows Server 2022 10.0.20348.0 – before 10.0.20348.5499
Microsoft Windows Server 2025 10.0.26100.0 – before 10.0.26100.33296
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 – before 10.0.26100.33296

Weakness: CWE-416, CWE-362 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References