EUVD-2026-73890
GHSA-9985-6wr4-mf59
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Victim must open a crafted document (UI:R, AV:L); no privilege required to trigger the parse; only memory disclosure, no write or crash impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
AnalysisAI
Buffer over-read (CWE-126) in Microsoft Word's document parsing code allows local disclosure of in-process memory when a victim opens a specially crafted file. All currently-supported Office release lines on Windows - 365 Apps for Enterprise, Office 2019, 2021, 2024 LTSC, and Word 2016 standalone - are affected across both x86 and x64 architectures. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim open a specially crafted Word document on a Windows system running an unpatched version of Microsoft Word 2016, Office 2019, Office LTSC 2021, Office LTSC 2024, or Microsoft 365 Apps for Enterprise. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 5.5 reflects a moderate-severity, single-system information disclosure requiring local file execution and user interaction. … 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 patch via Microsoft Update, Windows Update for Business, or the Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-126 – Buffer Over-read
View allSame technique Buffer Overflow
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External POC / Exploit Code
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