PT-2026-58146 · Microsoft · Windows 10 Version 1607+17

CVE-2026-49171 · Published 2026-07-14 · Updated 2026-07-14

Mitre

CVSS v3.1

7.5

High

Base vector

AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

Use after free in Microsoft Windows Speech allows an authorized attacker to elevate privileges locally.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-49171

Affected Products

Windows 10 Version 1607

Windows 10 Version 1809

Windows 10 Version 21H2

Windows 10 Version 22H2

Windows 11 Version 24H2

Windows 11 Version 25H2

Windows 11 Version 26H1

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2025

Windows 10 1607

Windows 10 1809

Windows 10 21H2

Windows 10 22H2

Windows 11 24H2

Windows 11 25H2

Windows 11 26H1

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-49171 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49171 · Vendor Advisory