EUVD-2026-73730
GHSA-xj3g-674g-xwpw
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered via crafted document, no privileges or special conditions required, user must open file; full triad impact confined to user session.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
AnalysisAI
Heap-based buffer overflow in Microsoft Office Word's document-parsing engine enables remote code execution when a victim opens a specially crafted file, yielding full confidentiality, integrity, and availability compromise of the user's session. Affected products span Microsoft 365 Apps for Enterprise, Office 2019, Office LTSC 2021, Office LTSC 2024, Word 2016, and corresponding macOS editions across both x86 and x64 architectures. …
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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 Word - this is the sole triggering condition. … 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 the threat: no authentication or special network position is required of the attacker, attack complexity is low, and the only friction is convincing a user to open a file - a threshold social engineering routinely clears. … 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 released patches for each affected product track immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Issue security alert to all employees warning against opening unsolicited Word documents and email attachments from untrusted sources; prepare patch deployment plan covering all Office versions. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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