---
id: CVE-2026-70264
title: >-
  Improper link resolution before file access ('link following') in Microsoft
  Defender allows an authorized attacker to disclose information locally.
summary: >-
  Improper link resolution before file access ('link following') in Microsoft
  Defender 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-59
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T21:18:14.320'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70264'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70264'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-13T19:43:29.041Z'
vendor: Microsoft
product: Windows Defender
affected:
  - windows_defender < 1.1.26090.9
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-13T20:48:03.607128Z'
epss: 0.00488
epssPercentile: 0.41776
---

## Overview

Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to disclose information locally.

## Remediation

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