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CVE-2026-78457 Details

Use after free in Windows Security Health Service allows an authorized attacker to elevate privileges locally.

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7 HIGHVector:CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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URL	Source(s)	Tag(s)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78457	[email protected]	PatchVendor Advisory

CWE-ID	CWE Name	Source
CWE-416	Use After Free	[email protected]

Product	Versions
microsoft windows 11 24h2	< 10.0.26100.9445
CPE cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:* Remediation No remediation found in references.
microsoft windows 11 25h2	< 10.0.26200.9445
CPE cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:* Remediation No remediation found in references.
microsoft windows 11 26h1	< 10.0.28000.2954
CPE cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:* cpe:2.3:o:microsoft:windows_11_26h1:::::::x64:* Remediation No remediation found in references.
microsoft windows server 2022	< 10.0.20348.5622
CPE cpe:2.3:o:microsoft:windows_server_2022:::::::: Remediation No remediation found in references.
microsoft windows server 2025	< 10.0.26100.33438
CPE cpe:2.3:o:microsoft:windows_server_2025:::::::: Remediation No remediation found in references.

3 change records found show changes

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