EUVD-2026-73311
GHSA-vw9m-2pph-jpqx
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered file-format exploit requiring no attacker auth (PR:N) but mandatory victim file-open action (UI:R); successful exploitation yields full user-context system compromise (C:H/I:H/A:H).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
AnalysisAI
Stack-based buffer overflow (CWE-121) in Microsoft Office Word enables a remote unauthenticated attacker to execute arbitrary code on a victim's machine by delivering a specially crafted Word document and inducing the target to open it. The vulnerability spans a wide swath of Office product lines - from Word 2016 through Office LTSC 2024 and Microsoft 365 Apps for Enterprise - on both Windows and macOS platforms. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must open a specially crafted Word document using an unpatched version of Microsoft Office Word - no special non-default server-side configuration is required beyond the vulnerable software being installed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score with full C:H/I:H/A:H impact reflects genuine severity - successful exploitation yields complete compromise of the victim user's environment. … 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 vendor-released patches immediately via Microsoft Update. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and inventory all Microsoft Office installations across the enterprise (Word 2016, Word 2019, Office LTSC 2024, Microsoft 365 Apps) on Windows and macOS systems; issue urgent end-user advisory warning against opening unsolicited or unexpected Word documents. …
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Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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