EUVD-2026-35664
GHSA-cx48-vhm5-22rm
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
3DescriptionCVE.org
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
AnalysisAI
Out-of-bounds read in Microsoft Office triggers local information disclosure when a victim opens a crafted document, exposing adjacent memory contents with high confidentiality impact. The vulnerability spans a wide product surface including Office 2016 through LTSC 2024, Microsoft 365 Apps for Enterprise, multiple SharePoint Server versions, and Mac variants, as confirmed by EUVD-2026-35664. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to open a maliciously crafted Microsoft Office document on a system running an unpatched version of an affected Microsoft Office or SharePoint product. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.5 Medium score is consistent with a local, user-interaction-required information disclosure with no code execution or integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious Office document and delivers it to a target via phishing email or a compromised file share within the victim's local network. When the victim opens the file with an unpatched Office installation, the out-of-bounds read is triggered in the document parser, leaking contents of adjacent memory that may include in-memory credentials, authentication tokens, or other sensitive document data. … |
| Remediation | Apply vendor-released patches per the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44821. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Microsoft Office Word contains an out-of-bounds read vulnerability that enables local code execution on affected systems
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Use after free in Microsoft Office allows an unauthorized attacker to execute code locally. [CVSS 8.4 HIGH]
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Local code execution in Microsoft Office Word is possible when a user opens a maliciously crafted document that triggers
Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
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