EUVD-2026-44184
GHSA-6875-4597-269v
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
File must be opened locally so AV:L with UI:R; no privileges needed (PR:N) and low complexity (AC:L); code execution yields full C:H/I:H/A:H.
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
2DescriptionCVE.org
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
AnalysisAI
Local code execution in Microsoft Office Word (across Microsoft 365 Apps, Office 2019/LTSC 2021/2024, Office for Mac, and Word 2016) allows an attacker to run arbitrary code by exploiting a use-after-free memory corruption flaw when a victim opens a maliciously crafted document. The CVSS 3.1 base score is 7.8 with a local attack vector requiring user interaction; there is no public exploit identified at time of analysis and the flaw is not listed in CISA KEV. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a victim to open or preview an attacker-crafted Word document in an affected Office/Word build - the CVSS UI:R flag confirms user interaction is mandatory, which is the primary limiting factor. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, 7.8 High) describes a low-complexity flaw needing no privileges but requiring the victim to open a file - the classic 'send a document, user opens it' Office pattern, which is local vector but network-deliverable via email or download. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker emails a booby-trapped Word document (or hosts it for download) to a target and uses social engineering to get the victim to open it; when Word parses the file, the use-after-free is triggered and attacker-controlled heap data hijacks execution, running code in the victim's user context. No authentication or elevated privileges are needed, but the AV:L/UI:R vector means the victim must open the file. … |
| Remediation | Patch available per vendor advisory - apply Microsoft's updates for every affected Office and SharePoint SKU as listed in the MSRC guidance at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55032 (exact fixed build numbers were not included in the source data and should be taken from that advisory per product and update channel). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Communicate the vulnerability scope to all IT teams and initiate a rapid assessment of affected Office versions across your environment. …
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Local code execution in Microsoft Word (and Office/SharePoint components that render Word content) stems from an integer
Local code execution in Microsoft Office (2016, 2019, LTSC 2021/2024, Microsoft 365 Apps, and the macOS editions) arises
Arbitrary code execution in Microsoft Office Word (and the broader Office/365/SharePoint family) arises from a stack-bas
Local code execution in Microsoft Office (including Microsoft 365 Apps for Enterprise, Office 2016/2019, and Office LTSC
Local code execution in Microsoft Word (part of Microsoft 365 Apps, Office 2019, Office LTSC 2021/2024, and Office for M
Local arbitrary code execution in Microsoft Office (2016, 2019, LTSC 2021/2024, Microsoft 365 Apps for Enterprise, and O
Arbitrary code execution in Microsoft PowerPoint (and the broader Microsoft Office/365 suite on Windows and macOS) arise
Local code execution in Microsoft Office PowerPoint (including Microsoft 365 Apps, Office 2019, Office LTSC 2021/2024, a
Local code execution in Microsoft Office PowerPoint (CWE-122 heap-based buffer overflow) lets an unauthorized attacker r
Local code execution in Microsoft Word (and the wider Microsoft Office / Microsoft 365 Apps family) lets an unauthorized
Local code execution in Microsoft Office (2016, 2019, LTSC 2021/2024, Microsoft 365 Apps for Enterprise, and Office for
Local code execution in Microsoft Office (2016, 2019, LTSC 2021/2024, Microsoft 365 Apps, and Office for Mac 2021/2024)
Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
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