Link following in Windows Defender - CVE-2026-70264
Published: October 13, 2026
Vulnerability identifier: #VU154317
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-70264
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to gain access to sensitive information on the system.
The vulnerability exists due to an insecure link following issue in Microsoft Defender. A local user can create a specially crafted symbolic link to a critical file on the system and disclose information.
Affected software
Windows Defender
How to mitigate CVE-2026-70264
Install updates from vendor's website.
Windows Defender - update to 1.1.26090.9