EUVD-2026-73891
GHSA-9mxf-mf8r-mr7g
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Local vector with user interaction required to open a crafted document; no privileges needed; read-only memory disclosure yields C:H with no integrity or availability 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 Office Word allows local information disclosure when a user opens a specially crafted document, exposing process memory contents with high-confidentiality impact. Affected builds span Word 2016, Office 2019, Office LTSC 2021, Office LTSC 2024, and Microsoft 365 Apps for Enterprise 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 actively open a specially crafted Word document - exploitation cannot occur passively or without user interaction (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.5 Medium score reflects a local, user-interaction-dependent vector (AV:L/UI:R) with no privilege requirement and confidentiality-only impact, which accurately captures the practical threat. … 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 Microsoft-released patch via Windows Update or the Microsoft Update Catalog, targeting the following minimum build versions: Word 2016 → 16.0.5569.1000; Office 2019 → 16.0.10417.20204; Office LTSC 2021 → 16.0.14334.20896; Office LTSC 2024 → 16.0.17932.20960; Microsoft 365 Apps for Enterprise → 16.0.20326.20136. … 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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