CVE-2026-70167: Windows Domain Name Service Remote Code Execution Vulnerability

Overview

Severity

High (CVSS 8.8)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Oct

Released

2026-10-13

Description

Access of resource using incompatible type ('type confusion') in DNS Server allows an authorized attacker to execute code over a network.

Affected Products (4)

Windows

• Windows Server 2022
• Windows Server 2022 (Server Core installation)
• Windows Server 2025 (Server Core installation)
• Windows Server 2025

Security Updates (2)

• 5126655
• 5126646

Acknowledgments

<a href="https://x.com/m4x_1997">Aobo Wang</a>

Revision History

• 2026-10-13: Information published.