EUVD-2026-44079
GHSA-jh9g-j7qf-9cm4
Severity by source
AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Local authenticated low-priv attacker (AV:L/PR:L); use-after-free requires a race/grooming so AC:H; kernel boundary crossing gives S:C with full C/I/A impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Use after free in Microsoft Windows allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Microsoft Windows (Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through 2025) arises from a use-after-free memory-corruption flaw (CWE-416) that lets an already-authenticated local user run code at elevated privilege. The CVSS 3.1 base score is 7.8 with a scope-changed vector, and Microsoft has shipped a fix via MSRC. …
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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 Windows system with at least low-level privileges (PR:L) and the ability to execute code locally; there is no network vector and no user interaction is needed (AV:L/UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are mixed and point to a real-but-not-emergency priority. … 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 foothold on a Windows host - for example via phishing, a compromised service account, or an unprivileged shell on a shared terminal/RDS server - runs a crafted program that triggers the use-after-free and grooms the freed kernel object to execute attacker-controlled code as SYSTEM. Because the CVSS complexity is High (AC:H), the exploit likely relies on winning a timing race and may need several attempts; no public proof-of-concept was identified at time of analysis. |
| Remediation | Patch available per vendor advisory - apply the Microsoft security update for CVE-2026-50476 through Windows Update / WSUS / your standard patch-management channel, selecting the cumulative update matching each affected build; consult the per-product fixed versions listed at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50476 (no single universal version number applies because each OS build ships its own KB). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all Windows 10, Windows 11, and Windows Server 2012-2025 systems across your organization. …
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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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