SB2026101357 - Information disclosure in Microsoft Defender
Published: October 13, 2026
Security Bulletin ID
SB2026101357
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Link following (CVE-ID: CVE-2026-70264)
CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.