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CVE-2026-70264— Microsoft Defender Information Disclosure Vulnerability

Quick assessment

Affected
Microsoft Windows Defender
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在对文件访问之前存在不当的链接解析（“符号链接跟随”）漏洞，微软 Defender 存在该问题，允许本地授权攻击者泄露信息。

CVSS 5.5 · Medium EPSS 0.43% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Windows Defender < 1.1.26090.9 affected
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I. Basic Information for CVE-2026-70264

Vulnerability Information
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Vulnerability Title
Microsoft Defender Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to disclose information locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows Defender 0 ~ 1.1.26090.9 -

II. Public POCs for CVE-2026-70264

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III. Intelligence Information for CVE-2026-70264

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Vendor Advisories for CVE-2026-70264 (1)

Same Patch Batch · Microsoft · 2026-10-13 · 1407 CVEs total

CVE-2026-83693 9.8 CRITICAL Windows Error Reporting Remote Code Execution Vulnerability
CVE-2026-84015 9.8 CRITICAL Remote Access Point-to-Point Protocol (PPP) EAP-TLS Remote Code Execution Vulnerability
CVE-2026-70157 9.8 CRITICAL Windows System Information Console Remote Code Execution Vulnerability
CVE-2026-70291 9.8 CRITICAL Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-96934 9.8 CRITICAL Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-96096 9.8 CRITICAL Windows Media Player Remote Code Execution Vulnerability
CVE-2026-96864 9.8 CRITICAL Microsoft Failover Cluster Virtual Driver Remote Code Execution Vulnerability
CVE-2026-96924 9.8 CRITICAL Windows OLE Remote Code Execution Vulnerability
CVE-2026-85806 9.8 CRITICAL Network Policy Server (NPS) Remote Code Execution Vulnerability
CVE-2026-83862 9.8 CRITICAL Windows Network Load Balancing Remote Code Execution Vulnerability
CVE-2026-100219 9.8 CRITICAL Microsoft QUIC Remote Code Execution Vulnerability
CVE-2026-83578 9.8 CRITICAL Microsoft PowerShell Remote Code Execution Vulnerability
CVE-2026-83935 9.8 CRITICAL Microsoft XML Remote Code Execution Vulnerability
CVE-2026-105010 9.8 CRITICAL Microsoft Windows Search Component Elevation of Privilege Vulnerability
CVE-2026-96909 9.8 CRITICAL Windows BitLocker Remote Code Execution Vulnerability
CVE-2026-100222 9.8 CRITICAL Network Policy Server (NPS) Remote Code Execution Vulnerability
CVE-2026-83748 9.8 CRITICAL Windows Error Reporting Remote Code Execution Vulnerability
CVE-2026-70147 9.8 CRITICAL Microsoft PostScript Printer Driver Remote Code Execution Vulnerability
CVE-2026-96219 9.8 CRITICAL Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerabi
CVE-2026-97749 9.8 CRITICAL Microsoft Office Outlook Remote Code Execution Vulnerability

Showing top 20 of 1407 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows Defender
Same vendor: Microsoft
Same weakness: CWE-59

V. Comments for CVE-2026-70264

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