CVE-2026-70119: Windows DNS Remote Code Execution Vulnerability

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Unlikely

Patch Tuesday

2026-Oct

Released

2026-10-13

Description

Out-of-bounds read in Windows DNS 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

Jonghoi Kim, Linzishan, Anemone and Zhiniang Peng with HUST

Revision History

• 2026-10-13: Information published.