CVE-2026-21519

Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21519	Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21519	US Government Resource

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_10_1607:::::::x64:*
	cpe:2.3:o:microsoft:windows_10_1607:::::::x86:*
	cpe:2.3:o:microsoft:windows_10_1809:::::::x64:*
	cpe:2.3:o:microsoft:windows_10_1809:::::::x86:*
	cpe:2.3:o:microsoft:windows_10_21h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_10_21h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_10_21h2:::::::x86:*
	cpe:2.3:o:microsoft:windows_10_22h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_10_22h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_10_22h2:::::::x86:*
	cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_23h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2016::::::::
	cpe:2.3:o:microsoft:windows_server_2019::::::::
	cpe:2.3:o:microsoft:windows_server_2022::::::::
	cpe:2.3:o:microsoft:windows_server_2022_23h2::::::::
	cpe:2.3:o:microsoft:windows_server_2025::::::::

History

No history.

Information

Published : 2026-02-10 18:16

Updated : 2026-02-11 16:13

NVD link : CVE-2026-21519

Mitre link : CVE-2026-21519

CVE.ORG link : CVE-2026-21519

JSON object : View

Products Affected

microsoft

windows_server_2022
windows_11_25h2
windows_11_24h2
windows_server_2022_23h2
windows_11_23h2
windows_server_2019
windows_server_2016
windows_10_1607
windows_10_22h2
windows_server_2025
windows_10_1809
windows_10_21h2

CWE

CWE-843

Access of Resource Using Incompatible Type ('Type Confusion')

{"id": "CVE-2026-21519", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2026-02-10T18:16:34.417", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21519", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21519", "tags": ["US Government Resource"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-843"}]}], "descriptions": [{"lang": "en", "value": "Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally."}, {"lang": "es", "value": "Acceso de recurso usando tipo incompatible ('confusi\u00f3n de tipos') en el Administrador de ventanas de escritorio permite a un atacante autorizado elevar privilegios localmente."}], "lastModified": "2026-02-11T16:13:16.180", "cisaActionDue": "2026-03-03", "cisaExploitAdd": "2026-02-10", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "E78A20FD-B910-43DF-BE89-E971E2FD0049", "versionEndExcluding": "10.0.14393.8868"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "B941280B-97F6-4F60-80A3-40482A74488D", "versionEndExcluding": "10.0.14393.8868"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "C09C54DA-6AB0-4696-A2F2-C11CFC292EA9", "versionEndExcluding": "10.0.17763.8389"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "369B4E41-3895-4CB7-BD37-D2E4A4D52FB9", "versionEndExcluding": "10.0.17763.8389"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "EDB3FD9A-2786-4EC1-8989-2B0D054E0307", "versionEndExcluding": "10.0.19044.6937"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "893DBA65-116B-4AE0-80E1-50458CB5FDAD", "versionEndExcluding": "10.0.19044.6937"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "37E2BFF1-28C0-4FA0-9A6C-020146E4AD54", "versionEndExcluding": "10.0.19044.6937"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "3ABF7E9C-769A-4330-AD97-FE3CD766E577", "versionEndExcluding": "10.0.19045.6937"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "F54B0C64-9A1F-470B-9824-322CF362507F", "versionEndExcluding": "10.0.19045.6937"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "A5BD3F0C-1E6F-4937-806C-B87CA19C2830", "versionEndExcluding": "10.0.19045.6937"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "B273EF5A-3157-4842-AE91-CEC289813902", "versionEndExcluding": "10.0.22631.6649"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "CD2513FC-D399-4DBF-921F-13B4D1497127", "versionEndExcluding": "10.0.22631.6649"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "B08450A0-0F7E-4A05-8989-900221992766", "versionEndExcluding": "10.0.26100.7781"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "9D30B348-DAE7-43EC-85FA-38E1715258A9", "versionEndExcluding": "10.0.26100.7781"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "8F23FFCF-9C69-4D27-AF21-D09A6041AA3A", "versionEndExcluding": "10.0.26200.7781"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "D1D93202-BDDB-438F-934E-1FE904B3651B", "versionEndExcluding": "10.0.26200.7781"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E21BC97D-1C11-41FD-9A20-34A2BC535BD9", "versionEndExcluding": "10.0.14393.8868"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B6E3E93E-8160-4BFB-B5CB-85740922CF7E", "versionEndExcluding": "10.0.17763.8389"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9E19FC4B-C3CC-4924-9A0B-5E4F100280D4", "versionEndExcluding": "10.0.20348.4711"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F0EA3C51-C3FE-494A-92D9-D3B1C301CB54", "versionEndExcluding": "10.0.25398.2149"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "33AF95F4-504F-40EF-9F64-5D6F7B40114F", "versionEndExcluding": "10.0.26100.32313"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com", "cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.", "cisaVulnerabilityName": "Microsoft Windows Type Confusion Vulnerability"}