EUVD-2026-44299
GHSA-45xc-qv8h-v2m4
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only use-after-free needing an authenticated user (AV:L, PR:L) and a timing race to reallocate freed memory (AC:H); successful EoP grants full C/I/A within unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.
AnalysisAI
Elevation of privilege in Microsoft Windows Management Services lets a low-privileged local user corrupt memory through a use-after-free (CWE-416) and gain higher privileges on Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025. A successful exploit yields high confidentiality, integrity, and availability impact, but the CVSS vector marks high attack complexity, reflecting the race-condition timing typically needed to win a use-after-free. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already have local, authenticated access to the target as a low-privileged user (CVSS PR:L, AV:L) - it is not remotely reachable and needs an existing foothold. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score is 7.0 (High) with vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - local vector, high attack complexity, and low privileges required, yielding full C/I/A impact within an unchanged scope. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already gained a low-privileged authenticated session on a Windows 11 or Windows Server 2025 host - for example via a compromised service account or a prior malware foothold - runs a crafted local program that triggers the use-after-free in Windows Management Services while racing to reallocate the freed object with attacker-controlled data. Winning the race lets them corrupt privileged memory and execute code at a higher integrity level, escalating from limited user toward SYSTEM. … |
| Remediation | Apply the Microsoft security update for CVE-2026-58544 (patch available per vendor advisory) via Windows Update or WSUS/SCCM/Intune to all affected client and server SKUs; consult https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58544 for the exact fixed KB and build number for each Windows 11 24H2/25H2/26H1 and Windows Server 2025 (including Server Core) release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 11 and Server 2025 systems to determine exposure scope and begin preparing the available Microsoft patch for deployment. …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
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