CVE tracker / CVE-2026-105520
CVE-2026-105520
CVE-2026-105520 is the Windows DNS Elevation of Privilege Vulnerability. Microsoft rates it Important, CVSS 7.2. It is not in CISA's Known Exploited Vulnerabilities catalog. Published November 10, 2026.
Risk summary
Microsoft describes it: “Improper link resolution before file access ('link following') in Windows DNS allows an authorized attacker to elevate privileges over a network.”
How to fix it
Microsoft lists 8 affected products and the update that fixes each:
- KB5131077 · fixed build 10.0.26100.33730
Windows Server 2025, Windows Server 2025 (Server Core installation) - KB5131080 · fixed build 10.0.26100.33822
Windows Server 2025, Windows Server 2025 (Server Core installation) - KB5131085 · fixed build 10.0.17763.9487
Windows Server 2019, Windows Server 2019 (Server Core installation) - KB5131090 · fixed build 10.0.20348.5870
Windows Server 2022 (Server Core installation), Windows Server 2022 - KB5131291 · fixed build 10.0.14393.9688
Windows Server 2016, Windows Server 2016 (Server Core installation)
What Microsoft changed
- November 10, 2026: Information published.
Details
- Weakness
- CWE-59: Improper Link Resolution Before File Access ('Link Following')
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- November 10, 2026
- Last revised
- November 10, 2026
Get told when this changes
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References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.