EUVD-2026-44152
GHSA-2h9j-hxw7-2jf3
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Document must be opened by a user so AV:L and UI:R; no prior privileges needed (PR:N) and code runs as the user granting full C/I/A impact.
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 allows an unauthorized attacker to execute code locally.
AnalysisAI
Local code execution in Microsoft Office (including Microsoft 365 Apps for Enterprise, Office 2016/2019, and Office LTSC 2021/2024) stems from a use-after-free memory-corruption flaw (CWE-416). An attacker who convinces a user to open a specially crafted Office document can execute arbitrary code in the context of the current user, gaining full confidentiality, integrity, and availability impact. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to open an attacker-crafted Office document (UI:R user interaction is mandatory per the CVSS vector), and code executes only in the context of the user who opens the file. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects a high-impact but user-interaction-gated flaw: the attack vector is Local because it requires opening a file, complexity is Low, no privileges are needed, but UI:R means a victim must act. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious Office document that triggers the use-after-free and emails it to a target as a plausible attachment (invoice, resume, report). When the victim opens the file and dismisses or bypasses Protected View, the dangling pointer is dereferenced, letting the attacker's payload execute code with the victim's privileges. … |
| Remediation | Patch available per vendor advisory - apply the Microsoft update referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47290; exact fixed build numbers were not included in the provided data, so retrieve them from that MSRC page and deploy the corresponding cumulative or Click-to-Run update for each edition. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and catalog all Office installations across affected versions (2016, 2019, 365 Apps for Enterprise, LTSC 2021/2024) and segment high-risk users (executives, finance, legal, data-access roles) for priority patching. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
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 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)
Local code execution in Microsoft Word (Office 2016/2019, Microsoft 365 Apps, Office LTSC 2021/2024) arises from a heap-
Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
View allShare
External POC / Exploit Code
Leaving vuln.today