Link following in Windows Server - CVE-2026-105520
Published: November 10, 2026
Vulnerability identifier: #VU164650
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-105520
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to escalate privileges to SYSTEM.
The vulnerability exists due to improper link resolution before file access in Windows DNS when accessing files through links. A remote privileged user can exploit incorrect link resolution over the network to gain SYSTEM privileges.
Affected software
Windows Server
How to mitigate CVE-2026-105520
Install security update from vendor's website.
Windows Server - addressed in versions 2016 10.0.14393.9688, 2019 10.0.17763.9487, 2022 10.0.20348.5870, 2025 10.0.26100.33730, 2025 10.0.26100.33822