Live › vulnerability › CVE-2026-21510
Go to dashboardA protection mechanism failure in the Microsoft Windows Shell lets an unauthorized attacker bypass a security feature over the network. CISA lists it as actively exploited in the wild.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Microsoft Windows | vendor | – | – |
| microsoft windows 10 1607 | vendor | < 10.0.14393.8868 | 10.0.14393.8868 |
| microsoft windows 10 1809 | vendor | < 10.0.17763.8389 | 10.0.17763.8389 |
| microsoft windows 10 21h2 | vendor | < 10.0.19044.6937 | 10.0.19044.6937 |
| microsoft windows 10 22h2 | vendor | < 10.0.19045.6937 | 10.0.19045.6937 |
| microsoft windows 11 23h2 | vendor | < 10.0.22631.6649 | 10.0.22631.6649 |
| microsoft windows 11 24h2 | vendor | < 10.0.26100.7781 | 10.0.26100.7781 |
| microsoft windows 11 25h2 | vendor | < 10.0.26200.7781 | 10.0.26200.7781 |
| microsoft windows server 2012 | vendor | – | – |
| microsoft windows server 2012 | vendor | = r2 | – |
| microsoft windows server 2016 | vendor | < 10.0.14393.8868 | 10.0.14393.8868 |
| microsoft windows server 2019 | vendor | < 10.0.17763.8389 | 10.0.17763.8389 |
| microsoft windows server 2022 | vendor | < 10.0.20348.4711 | 10.0.20348.4711 |
| microsoft windows server 2022 23h2 | vendor | < 10.0.25398.2149 | 10.0.25398.2149 |
| microsoft windows server 2025 | vendor | < 10.0.26100.32313 | 10.0.26100.32313 |
Unknown from the sources.
Apply the mitigations per Microsoft's vendor instructions, as CISA requires; the sources do not name a patched build.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft Windows Shell contains a protection mechanism failure vulnerability that could allow an unauthorized attacker to bypass a security feature over a network.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
This page as .md · .json · in your agent: get_signal("CVE-2026-21510")
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