EUVD-2026-73819
GHSA-gg28-rr5x-v7j3
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network delivery via malicious document, low complexity, no auth needed, single user interaction; full triad impact consistent with UAF RCE in document parser.
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
Use-after-free in Microsoft Word enables remote code execution when a victim opens or interacts with a specially crafted document. The CVSS vector (AV:N/AC:L/PR:N/UI:R) reflects delivery over the network with no authentication required and only a single user interaction - opening a malicious file - as the prerequisite. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must open or preview a specially crafted Office document using an unpatched version of Microsoft Word on Windows or macOS - this is the only prerequisite (UI:R per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score reflects a high-severity flaw with a broad attack surface: network delivery, low complexity, no prior authentication, and full triad impact (C:H/I:H/A:H). … 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 via Microsoft Update or the Microsoft 365 Admin Center immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an immediate inventory of all Microsoft Office installations across the organization, including Word 2016, Office 2019, Office LTSC 2021/2024, and Microsoft 365 Apps for Enterprise on Windows and Mac platforms, with priority flagging for high-value systems and those processing sensitive information. …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
View allShare
External POC / Exploit Code
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