Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local EoP requiring an existing low-privileged account (AV:L, PR:L), no user interaction or added complexity, yielding full SYSTEM-level C/I/A within unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Improper access control in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Microsoft Windows Search component lets an already-authenticated low-privilege user gain SYSTEM-level rights through improper access control (CWE-284). It affects all currently supported Windows client and server builds from Windows 10 1809 through Windows 11 26H1 and Windows Server 2019 through 2025. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already hold valid local, low-privileged access to the target Windows machine (CVSS PR:L, AV:L), and the Windows Search component must be present and running - which it is by default on all listed client and server SKUs. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (7.8, High) describes a local attack requiring only low existing privileges, low complexity, and no user interaction, yielding full confidentiality, integrity, and availability impact within the same scope - a classic reliable local EoP profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already obtained a standard, non-administrative account on a Windows host - for example through phishing, a stolen credential, or a shared terminal server - invokes the vulnerable Windows Search functionality to abuse its improper access-control check and execute code or actions in the security context of the elevated service, obtaining SYSTEM-level privileges. Given AC:L and UI:N, the technique is low-complexity and needs no victim interaction once the attacker has local access; no public POC was provided in the source data. |
| Remediation | Patch available per vendor advisory - apply the Microsoft security update for CVE-2026-50373 via Windows Update or your patch-management system as the primary fix, selecting the KB that matches each affected SKU (Windows 10 1809/21H2/22H2, Windows 11 24H2/25H2/26H1, Windows Server 2019/2022/2025 including Server Core) as listed at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50373; exact fixed build numbers should be taken from that advisory rather than assumed. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running Windows 10 versions 1809 through current, Windows 11 through build 26H1, or Windows Server 2019-2025, and classify by criticality. …
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-43908
GHSA-mxjm-62rx-cx94