EUVD-2026-73151
GHSA-cvh7-vpp2-mvrq
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered malicious document requires no auth (PR:N); user must open it (UI:R); full C/I/A:H for arbitrary code execution within user context; scope unchanged (S:U).
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 in Microsoft Word (CWE-121) enables remote code execution by enticing a user to open a maliciously crafted document, with full compromise of confidentiality, integrity, and availability. Affected products span Office 2019, 2021, and 2024 LTSC on both Windows (x86/x64) and macOS, as well as Microsoft 365 Apps for Enterprise and Word 2016. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target must open a malicious Word document using an unpatched version of Microsoft Word across any of the affected product lines (Microsoft 365 Apps for Enterprise, Office 2019/2021/2024 LTSC on Windows x86/x64, Word 2016, or Office LTSC/365 for Mac). … 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) accurately characterizes a high-impact flaw requiring only that the target open a malicious document - a routine social-engineering precondition that imposes minimal practical friction on a skilled attacker. … 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 available through the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69722. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all systems running affected Word versions across Windows (x86/x64) and macOS platforms, with particular attention to Microsoft 365 App deployments. …
Sign in for detailed remediation steps and compensating controls.
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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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