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NVD Vulnerability Details :
CVE-2026-21510
Analyzed
More InfoOfficial Page
Source-secure@microsoft.com
View Known Exploited Vulnerability (KEV) details
Published At-10 Feb, 2026 | 18:16
Updated At-11 Feb, 2026 | 16:13

Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
2026-02-102026-03-03Microsoft Windows Shell Protection Mechanism Failure VulnerabilityApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Date Added: 2026-02-10
Due Date: 2026-03-03
Vulnerability Name: Microsoft Windows Shell Protection Mechanism Failure Vulnerability
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.
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.18.8HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CPE Matches

Microsoft Corporation
microsoft
>>windows_10_1607>>Versions before 10.0.14393.8868(exclusive)
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
Microsoft Corporation
microsoft
>>windows_10_1607>>Versions before 10.0.14393.8868(exclusive)
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
Microsoft Corporation
microsoft
>>windows_10_1809>>Versions before 10.0.17763.8389(exclusive)
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
Microsoft Corporation
microsoft
>>windows_10_1809>>Versions before 10.0.17763.8389(exclusive)
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
Microsoft Corporation
microsoft
>>windows_10_21h2>>Versions before 10.0.19044.6937(exclusive)
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
Microsoft Corporation
microsoft
>>windows_10_21h2>>Versions before 10.0.19044.6937(exclusive)
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
Microsoft Corporation
microsoft
>>windows_10_21h2>>Versions before 10.0.19044.6937(exclusive)
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
Microsoft Corporation
microsoft
>>windows_10_22h2>>Versions before 10.0.19045.6937(exclusive)
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
Microsoft Corporation
microsoft
>>windows_10_22h2>>Versions before 10.0.19045.6937(exclusive)
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
Microsoft Corporation
microsoft
>>windows_10_22h2>>Versions before 10.0.19045.6937(exclusive)
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
Microsoft Corporation
microsoft
>>windows_11_23h2>>Versions before 10.0.22631.6649(exclusive)
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
Microsoft Corporation
microsoft
>>windows_11_23h2>>Versions before 10.0.22631.6649(exclusive)
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
Microsoft Corporation
microsoft
>>windows_11_24h2>>Versions before 10.0.26100.7781(exclusive)
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
Microsoft Corporation
microsoft
>>windows_11_24h2>>Versions before 10.0.26100.7781(exclusive)
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
Microsoft Corporation
microsoft
>>windows_11_25h2>>Versions before 10.0.26200.7781(exclusive)
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
Microsoft Corporation
microsoft
>>windows_11_25h2>>Versions before 10.0.26200.7781(exclusive)
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
Microsoft Corporation
microsoft
>>windows_server_2012>>-
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
Microsoft Corporation
microsoft
>>windows_server_2012>>r2
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
Microsoft Corporation
microsoft
>>windows_server_2016>>Versions before 10.0.14393.8868(exclusive)
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
Microsoft Corporation
microsoft
>>windows_server_2019>>Versions before 10.0.17763.8389(exclusive)
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
Microsoft Corporation
microsoft
>>windows_server_2022>>Versions before 10.0.20348.4711(exclusive)
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
Microsoft Corporation
microsoft
>>windows_server_2022_23h2>>Versions before 10.0.25398.2149(exclusive)
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
Microsoft Corporation
microsoft
>>windows_server_2025>>Versions before 10.0.26100.32313(exclusive)
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-693Secondarysecure@microsoft.com
CWE ID: CWE-693
Type: Secondary
Source: secure@microsoft.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21510secure@microsoft.com
Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21510134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource
Hyperlink: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21510
Source: secure@microsoft.com
Resource:
Vendor Advisory
Hyperlink: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21510
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
US Government Resource
Change History
0Changes found

Details not found