---
id: CVE-2026-69794
title: >-
  Buffer over-read in Windows Encrypting File System (EFS) allows an authorized
  attacker to disclose information locally.
summary: >-
  Buffer over-read in Windows Encrypting File System (EFS) allows an authorized
  attacker to disclose information locally.
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-126
vendor: Microsoft
product: Windows 10 Version 1607
affected:
  - windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9512
  - windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9245
  - windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7725
  - windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7725
  - windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7582
  - windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7582
  - windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9445
  - windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9445
  - windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2954
  - windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9512
  - >-
    windows_server_2016_server_core_installation >= 10.0.14393.0 <
    10.0.14393.9512
  - windows_server_2019 >= 10.0.17763.0 < 10.0.17763.9245
  - >-
    windows_server_2019_server_core_installation >= 10.0.17763.0 <
    10.0.17763.9245
  - windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5622
  - windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33438
  - >-
    windows_server_2025_server_core_installation >= 10.0.26100.0 <
    10.0.26100.33438
published: '2026-09-08'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:17:55.690'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69794'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69794'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-08T19:47:43.798216Z'
ingestedAt: '2026-09-08T19:08:49.620Z'
epss: 0.00396
epssPercentile: 0.33575
---

## Overview

Buffer over-read in Windows Encrypting File System (EFS) allows an authorized attacker to disclose information locally.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.