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9.8
CVE-2026-100222: Windows NPS may let attackers run code remotely
CVE-2026-100222 · published 22 days ago
Summary
The Network Policy Server feature in certain versions of Windows 10 and Windows 11 has a coding error that could let an outside attacker run their own programs on your computer over the network. This could give the attacker control of the system or access to sensitive data. Apply the latest Windows updates or patches to fix the issue.
What to do
- Update microsoft windows 10 version 1607 to version 10.0.14393.9612 or later.
- Update microsoft windows 10 version 1809 to version 10.0.17763.9376 or later.
- Update microsoft windows 10 version 21h2 to version 10.0.19044.7807 or later.
- Update microsoft windows 11 version 23h2 to version 10.0.22631.7652 or later.
- Update microsoft windows 11 version 24h2 to version 10.0.26100.9711 or later.
- Update microsoft windows 11 version 25h2 to version 10.0.26200.9711 or later.
- Update microsoft windows 11 version 26h1 to version 10.0.28000.3231 or later.
- Update microsoft windows 11 version 26h2 to version 10.0.26300.9711 or later.
- Update microsoft windows server 2012 to version 6.2.9200.26434 or later.
- Update microsoft windows server 2012 (server core installation) to version 6.2.9200.26434 or later.
- Update microsoft windows server 2012 r2 to version 6.3.9600.23470 or later.
- Update microsoft windows server 2012 r2 (server core installation) to version 6.3.9600.23470 or later.
- Update microsoft windows server 2016 to version 10.0.14393.9612 or later.
- Update microsoft windows server 2016 (server core installation) to version 10.0.14393.9612 or later.
- Update microsoft windows server 2019 to version 10.0.17763.9376 or later.
- Update microsoft windows server 2019 (server core installation) to version 10.0.17763.9376 or later.
- Update microsoft windows server 2022 to version 10.0.20348.5761 or later.
- Update microsoft windows server 2025 to version 10.0.26100.33650 or later.
- Update microsoft windows server 2025 (server core installation) to version 10.0.26100.33650 or later.
- Update microsoft windows_10_1607 to version 10.0.14393.9612 or later.
- Update microsoft windows_10_1809 to version 10.0.17763.9376 or later.
- Update microsoft windows_10_21h2 to version 10.0.19044.7807 or later.
- Update microsoft windows_10_22h2 to version 10.0.19045.7807 or later.
- Update microsoft windows_11_23h2 to version 10.0.22631.7652 or later.
- Update microsoft windows_11_24h2 to version 10.0.26100.9711 or later.
- Update microsoft windows_11_25h2 to version 10.0.26200.9711 or later.
- Update microsoft windows_11_26h1 to version 10.0.28000.3231 or later.
- Update microsoft windows_11_26h2 to version 10.0.26300.9711 or later.
- Update microsoft windows_server_2016 to version 10.0.14393.9612 or later.
- Update microsoft windows_server_2019 to version 10.0.17763.9376 or later.
- Update microsoft windows_server_2022 to version 10.0.20348.5761 or later.
- Update microsoft windows_server_2025 to version 10.0.26100.33650 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | windows 10 version 1607 | < 10.0.14393.9612 |
| microsoft | windows 10 version 1809 | < 10.0.17763.9376 |
| microsoft | windows 10 version 21h2 | < 10.0.19044.7807 |
| microsoft | windows 10 version 22h2 |
< 10.0.19044.7807 < 10.0.19045.7807 |
| microsoft | windows 11 version 23h2 | < 10.0.22631.7652 |
| microsoft | windows 11 version 24h2 | < 10.0.26100.9711 |
| microsoft | windows 11 version 25h2 | < 10.0.26200.9711 |
| microsoft | windows 11 version 26h1 | < 10.0.28000.3231 |
| microsoft | windows 11 version 26h2 | < 10.0.26300.9711 |
| microsoft | windows server 2012 | < 6.2.9200.26434 |
| microsoft | windows server 2012 (server core installation) | < 6.2.9200.26434 |
| microsoft | windows server 2012 r2 | < 6.3.9600.23470 |
| microsoft | windows server 2012 r2 (server core installation) | < 6.3.9600.23470 |
| microsoft | windows server 2016 | < 10.0.14393.9612 |
| microsoft | windows server 2016 (server core installation) | < 10.0.14393.9612 |
| microsoft | windows server 2019 | < 10.0.17763.9376 |
| microsoft | windows server 2019 (server core installation) | < 10.0.17763.9376 |
| microsoft | windows server 2022 | < 10.0.20348.5761 |
| microsoft | windows server 2025 | < 10.0.26100.33650 |
| microsoft | windows server 2025 (server core installation) | < 10.0.26100.33650 |
| microsoft | windows_10_1607 |
< 10.0.14393.9612 cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_1809 |
< 10.0.17763.9376 cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_21h2 |
< 10.0.19044.7807 cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_10_22h2 |
< 10.0.19045.7807 cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_23h2 |
< 10.0.22631.7652 cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_24h2 |
< 10.0.26100.9711 cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_25h2 |
< 10.0.26200.9711 cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_26h1 |
< 10.0.28000.3231 cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_26h2 |
< 10.0.26300.9711 cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_server_2012 |
r2 cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 |
< 10.0.14393.9612 cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:x64:* |
| microsoft | windows_server_2019 |
< 10.0.17763.9376 cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:x64:* |
| microsoft | windows_server_2022 |
< 10.0.20348.5761 cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:* |
| microsoft | windows_server_2025 |
< 10.0.26100.33650 cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* |
Original advisory text
Network Policy Server (NPS) Remote Code Execution Vulnerability
Heap-based buffer overflow in Network Policy Server (NPS) allows an unauthorized attacker to execute code over a network.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100222 vendor-advisory patch
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker full control
Type
CWE-122Heap-based Buffer Overflow
CWE-191Integer Underflow (Wrap or Wraparound)
Timeline
Published13 Oct 2026
Updated31 Oct 2026
First seen13 Oct 2026
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