EUVD-2026-73149
GHSA-87rg-666m-2h6w
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
File is network-deliverable (AV:N), no special conditions required (AC:L), victim must open the file (UI:R), full process compromise upon exploitation (C:H/I:H/A:H).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft Office PowerPoint stems from a use-after-free memory corruption flaw (CWE-416) that enables network-based attackers to execute arbitrary code when a victim opens a crafted presentation file. All major Office editions are affected - Microsoft 365 Apps for Enterprise, Office LTSC 2021 and 2024, Office 2019, PowerPoint 2016, and multiple macOS variants - spanning a broad enterprise and consumer installed base. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a victim to open a specially crafted PowerPoint file using an unpatched version of Microsoft PowerPoint or Office across any of the listed product editions (365 Apps for Enterprise, LTSC 2021/2024, Office 2019, PowerPoint 2016, or affected Mac variants). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects high severity with low attack complexity and full confidentiality, integrity, and availability impact - the principal mitigating factor being the requirement for user interaction to open a malicious file. … 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 | The primary remediation is to apply Microsoft's released patches via Windows Update or the Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Microsoft Office installations, specifically identifying systems running Microsoft 365 Apps for Enterprise, Office LTSC 2021/2024, Office 2019, and PowerPoint 2016 on Windows and macOS. …
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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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