EUVD-2026-73816
GHSA-2v9m-mrr5-7p9c
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Document delivered over network (AV:N, PR:N), requires victim to open it (UI:R); UAF yields full memory corruption impact (C:H/I:H/A:H) scoped to user process (S:U).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft Office Word via a use-after-free (CWE-416) memory corruption flaw allows an unauthenticated network attacker to compromise a target system when the victim opens a specially crafted document. All major release tracks are affected - Office 2019, LTSC 2021, LTSC 2024, and Microsoft 365 Apps for Enterprise on both Windows and macOS - with fixed builds published by Microsoft. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must deliver a specially crafted Word document to the target and the target must open it - via email attachment, web download, or network share. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) places this firmly in the high-severity category. … 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 Microsoft's security update to reach the following minimum patched builds: Office 2019 → 16.0.10417.20207; Office LTSC 2021 → 16.0.14334.20896; Office LTSC 2024 → 16.0.17932.20960; Microsoft 365 Apps for Enterprise → 16.0.20326.20138. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: enumerate all systems running Office 2019, LTSC 2021, LTSC 2024, and Microsoft 365 Apps to quantify exposure; coordinate with security and IT leadership on patching priority (critical systems first). …
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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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