EUVD-2026-44144
GHSA-qrhv-vrqx-88v2
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-delivered crafted OLE object with no auth (PR:N) but a hard-to-control memory state (AC:H) yielding full code execution (C:H/I:H/A:H).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Access of resource using incompatible type ('type confusion') in Windows OLE allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft Windows OLE (Object Linking and Embedding) allows an unauthorized network attacker to run arbitrary code by triggering a type-confusion condition (CWE-843) in the OLE component. The flaw affects a broad range of client and server SKUs from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 R2 through Server 2025, and carries a CVSS 8.1 (High) rating. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target to process an attacker-crafted OLE object over a network-reachable path (AV:N), such as a client or service that parses OLE/compound-document or structured-storage data; the CVSS marks PR:N and UI:N, meaning no authentication and, as scored, no user interaction. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H, 8.1 High) signals a network-reachable, unauthenticated code-execution flaw with full CIA impact but a mitigating high attack complexity, meaning the attacker must satisfy a non-trivial condition (e.g., a specific heap layout or race) rather than firing a single deterministic request. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious OLE object - for example embedded in a document, delivered over a network share, or served through a client application that parses OLE/structured-storage data - that forces Windows OLE to treat a memory object as an incompatible type. When the target system processes the object, the type confusion corrupts memory and lets the attacker hijack control flow to execute arbitrary code in the affected process context. … |
| Remediation | Apply the Microsoft security update for CVE-2026-50686 for your specific Windows/Windows Server build; the input confirms a vendor-released patch is available, so treat the monthly cumulative/security update referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50686 as the primary and authoritative fix (exact fixed build numbers are listed there and were not provided in this input, so do not assume a version). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all affected systems across Windows 10 (1607+), Windows 11, and Windows Server (2012 R2 through 2025) environments and confirm patch availability through Microsoft security advisories. …
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External POC / Exploit Code
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