EUVD-2026-35668
GHSA-6gjp-59mg-98gh
Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
AnalysisAI
Local code execution in Microsoft Office stems from a type confusion (CWE-843) flaw that allows an unauthenticated attacker with local access to run arbitrary code in the context of the Office process. The CVSS 8.4 score reflects high impact on confidentiality, integrity, and availability without requiring privileges or user interaction, though the attack vector is local. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires local access to the system in the form of an Office document or content that can reach an Office parsing component on the target host; the CVSS vector explicitly removes the usual user-interaction prerequisite (UI:N) and authentication prerequisite (PR:N), so the exploitable path likely involves a parser that runs without the user explicitly opening a document, such as preview-pane rendering, search indexing, or background telemetry of Office files. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates local attack vector with low complexity, no privileges, and no user interaction - an unusual combination for an Office bug, because Office exploitation typically requires UI:R (a user opening a document). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker delivers a crafted Office document to a target endpoint - for example, dropped to a monitored share, written by a low-privileged process, or staged via a phishing payload that lands on disk - and the document triggers the type confusion when Office or a background Office component parses it, yielding code execution in the user's session. Because the CVSS vector specifies UI:N, the trigger may occur through preview, indexing, or auto-processing rather than an explicit user open. … |
| Remediation | Patch available per vendor advisory - apply the Microsoft security update referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45456 to every impacted Office installation through Microsoft Update, Click-to-Run, WSUS, or Intune as appropriate for the deployment channel. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Microsoft Office installations across the enterprise; confirm no vendor patch is available. …
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Same technique Authentication Bypass
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External POC / Exploit Code
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