EUVD-2026-73923
GHSA-xc87-v37h-p529
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
User must open crafted document (UI:R, AV:L); no system privileges needed since attacker delivers via untrusted document (PR:N); full impact triad appropriate for local code execution.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
External control of file name or path in Microsoft Office Word allows an unauthorized attacker to execute code locally.
AnalysisAI
External file path control in Microsoft Office Word enables local code execution with full confidentiality, integrity, and availability impact when a target user opens a specially crafted document. All major Office release tracks are affected across Windows and macOS - Office 2016, 2019, 2021 LTSC, LTSC 2024, and Microsoft 365 Apps for Enterprise. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target user to open a specially crafted Microsoft Word document (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 with vector AV:L/AC:L/PR:N/UI:R is internally consistent: the local attack vector reflects that exploitation occurs when the document is processed on the victim's machine rather than over a network service, while PR:N and AC:L indicate no special privileges or configuration are required beyond delivering the file. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patches as directed by the Microsoft Security Response Center at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62804. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Alert users to avoid opening Office documents from untrusted sources and document which Office versions are currently deployed across your organization. …
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External POC / Exploit Code
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