CVE-2026-69591

Published: Sep 8, 2026Modified: Sep 14, 2026

5.7

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Exploitability: 2.1 / Impact: 3.6

Source: secure@microsoft.com (Secondary)

Description

Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information over a network.

Affected (19)

Products: Microsoft: Windows 10 1809, Windows 10 21h2, Windows 10 22h2, Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2019, Windows Server 2022, Windows Server 2025

10 products

Windows 10 1809

Windows 10 21h2

Windows 10 22h2

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2019

Windows Server 2022

Windows Server 2025

Configuration A

19 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 1809	Before 10.0.17763.9245
Microsoft Windows 10 1809	Before 10.0.17763.9245
Microsoft Windows 10 21h2	Before 10.0.19044.7725
Microsoft Windows 10 21h2	Before 10.0.19044.7725
Microsoft Windows 10 21h2	Before 10.0.19044.7725
Microsoft Windows 10 22h2	Before 10.0.19045.7725
Microsoft Windows 10 22h2	Before 10.0.19045.7725
Microsoft Windows 10 22h2	Before 10.0.19045.7725
Microsoft Windows 11 23h2	Before 10.0.22631.7582
Microsoft Windows 11 23h2	Before 10.0.22631.7582
Microsoft Windows 11 24h2	Before 10.0.26100.9445
Microsoft Windows 11 24h2	Before 10.0.26100.9445
Microsoft Windows 11 25h2	Before 10.0.26200.9445
Microsoft Windows 11 25h2	Before 10.0.26200.9445
Microsoft Windows 11 26h1	Before 10.0.28000.2954
Microsoft Windows 11 26h1	Before 10.0.28000.2954
Microsoft Windows Server 2019	Before 10.0.17763.9245
Microsoft Windows Server 2022	Before 10.0.20348.5622
Microsoft Windows Server 2025	Before 10.0.26100.33438

Related CWEs

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69591

Source: secure@microsoft.com

PatchVendor Advisory

Timeline

No history available yet.