CVE-2026-100222

Heap-based buffer overflow in Network Policy Server (NPS) allows an unauthorized attacker to execute code over a network.

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

1.1% chance of exploitation in the next 30 days; higher than 64% of CVEs (scores of 2026-10-25)

CWEs

CWE-122, CWE-191

Published

2026-10-13

Modified

2026-10-20

Record from

the NVD, synced 2026-10-21

Affected

• microsoft:windows_10_1607
• microsoft:windows_10_1809
• microsoft:windows_10_21h2
• microsoft:windows_10_22h2
• microsoft:windows_11_23h2
• microsoft:windows_11_24h2
• microsoft:windows_11_25h2
• microsoft:windows_11_26h1
• microsoft:windows_11_26h2
• microsoft:windows_server_2012
• microsoft:windows_server_2016
• microsoft:windows_server_2019
• microsoft:windows_server_2022
• microsoft:windows_server_2025

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100222

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