Vulnerability in Microsoft Windows Defender

[ Description ]Official description

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

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• CERT-FR14 Oct 2026CERTFR-2026-AVI-1314

  Multiple vulnerabilities in Microsoft Windows Translated from French

  Multiple vulnerabilities have been discovered in Microsoft Windows. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service. Microsoft reports that…

  CVE-2026-70096CVE-2026-100200CVE-2026-100201+1118 more CVEs
• BSI CERT-Bund13 Oct 2026WID-SEC-2026-3919

  Microsoft SystemCenter (Defender and Configuration Manager): Multiple vulnerabilities Translated from German

  CVE-2026-70264CVE-2026-70049CVE-2026-102204+2 more CVEs
• NCSC-NL13 Oct 2026NCSC-2026-0425

  Vulnerabilities fixed in Microsoft System Center Translated from Dutch

  Probability/damage M/HCVE-2026-70264CVE-2026-88075CVE-2026-102204

[ References ]References

• msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70264