EUVD-2026-44050
GHSA-7vm6-25cv-9xxx
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local privilege escalation requiring an existing low-privileged foothold (AV:L, PR:L), no user interaction, with kernel-level compromise yielding full C/I/A impact.
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
Buffer over-read in Windows Overlay Filter allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Overlay Filter (WOF) driver affects a broad range of Windows client and server releases, from Windows 10 1607 and Server 2012 R2 through Windows 11 26H1 and Server 2025. An authenticated local attacker with low privileges can trigger a buffer over-read (CWE-126) in the filter to elevate to higher privileges, gaining full confidentiality, integrity, and availability impact on the host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already have valid low-privileged local access to the target host (CVSS PR:L), matching a local attack vector (AV:L) - this is not remotely reachable and cannot be triggered by an unauthenticated network attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) describes a locally exploitable, low-complexity privilege escalation that requires the attacker to already hold low-level privileges on the host but needs no user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already gained low-privileged access to a Windows host - for example a standard user session on a Remote Desktop server or code execution from a low-integrity foothold - invokes the Windows Overlay Filter with crafted input that triggers the out-of-bounds read in kernel context. By leveraging the resulting memory disclosure or corruption they escalate to SYSTEM-level privileges. … |
| Remediation | Apply the Microsoft security update for CVE-2026-50435; a patch is available per the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50435 (Patch available per vendor advisory - consult the MSRC page for the exact KB and patched build for each affected Windows/Windows Server SKU). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows systems affected (Windows 10 1607+, Windows 11, Server 2012 R2-2025) and prioritize critical servers and workstations; cross-reference with your Active Directory to identify highest-value targets. …
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Same weakness CWE-126 – Buffer Over-read
View allSame technique Buffer Overflow
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External POC / Exploit Code
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