EUVD-2026-56708
GHSA-6hjh-h637-rp4m
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Local vector confirmed by document-open exploitation model; PR:N because attacker needs no system privileges, only ability to deliver the file; UI:R because victim must open the document; full CIA impact from code execution.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to execute code locally.
AnalysisAI
Code execution via buffer over-read in Microsoft Office Word affects multiple Windows and Mac Office product lines when a user opens a specially crafted document. The CVSS vector (AV:L/AC:L/PR:N/UI:R) confirms this is a local exploitation scenario requiring user interaction - consistent with a malicious document delivery attack - yielding full confidentiality, integrity, and availability impact on the affected system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | User interaction is required - the victim must actively open a malicious Word document (UI:R confirmed by CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High score is credible given full C/H/I/A impact and low attack complexity once a user opens the malicious file. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious Word document embedding content specifically designed to trigger a buffer over-read in Office Word's parser. The document is delivered to the target via phishing email or a compromised download link; when the victim opens it, the parser reads beyond buffer bounds, enabling code execution in the context of the logged-in user. … |
| Remediation | Apply the vendor-released patch immediately via Microsoft Update or the Office update mechanism. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Microsoft Office Word installations across your Windows and Mac environments and communicate patch availability to IT leadership for emergency deployment planning. …
Sign in for detailed remediation steps and compensating controls.
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Same weakness CWE-126 – Buffer Over-read
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
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