MSRC-CVE-2026-70264 — Microsoft Defender Information Disclosure Vulnerability

Summary

Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

What type of information could be disclosed by this vulnerability?
The type of information that could be disclosed if an attacker successfully exploited this vulnerability is unauthorized file system access - reading from the file system.

Vulnerabilities 1

Medium 5.5

CVE-2026-70264

Microsoft Defender Information Disclosure Vulnerability

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

Microsoft Windows Defender Windows

Oct 13, 2026

Revision history

2026-10-13 #1
Information published.

References

CVE-2026-70264 Microsoft Defender Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70264
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss