CVE tracker / CVE-2026-32209
CVE-2026-32209
CVE-2026-32209 is the Windows Filtering Platform (WFP) Security Feature Bypass Vulnerability. Microsoft rates it Important, CVSS 4.4. It is not in CISA's Known Exploited Vulnerabilities catalog. Published May 12, 2026.
Risk summary
Microsoft describes it: “Improper access control in Windows Filtering Platform (WFP) allows an authorized attacker to bypass a security feature locally.”
How to fix it
Microsoft lists 31 affected products and the update that fixes each:
- KB5087420 · fixed build 10.0.22631.7079
Windows 11 Version 23H2 for ARM64-based Systems - KB5087470 · fixed build 6.2.9200.26079
Windows Server 2012 (Server Core installation), Windows Server 2012 - KB5087471 · fixed build 6.3.9600.23181
Windows Server 2012 R2 (Server Core installation), Windows Server 2012 R2 - KB5087537 · fixed build 10.0.14393.9140
Windows Server 2016 (Server Core installation), Windows Server 2016, Windows 10 Version 1607 for x64-based Systems, Windows 10 Version 1607 for 32-bit Systems - KB5087538 · fixed build 10.0.17763.8755
Windows Server 2019 (Server Core installation), Windows Server 2019, Windows 10 Version 1809 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems - KB5087539 · fixed build 10.0.26100.32860
Windows Server 2025, Windows Server 2025 (Server Core installation) - KB5087541 · fixed build 10.0.25398.2330
Windows Server 2022, 23H2 Edition (Server Core installation) - KB5087544 · fixed build 10.0.19044.7291
Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for 32-bit Systems - KB5087545 · fixed build 10.0.20348.5139
Windows Server 2022, Windows Server 2022 (Server Core installation) - KB5089548 · fixed build 10.0.28000.2113
Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems - KB5089549 · fixed build 10.0.26100.8457, 10.0.26200.8457
Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems - KB5093998 · fixed build 10.0.22631.7219
Windows 11 Version 23H2 for x64-based Systems - KB5094127 · fixed build 10.0.19045.7417
Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems
What Microsoft changed
- May 12, 2026: Information published.
Details
- Weakness
- CWE-284: Improper Access Control
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- May 12, 2026
- Last revised
- May 12, 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.