EUVD-2026-73845
GHSA-fh8f-9q7f-p793
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
File delivered remotely (AV:N), no attacker auth needed (PR:N), victim must open document (UI:R); full CIA impact from arbitrary code execution in user context.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft 365 Apps for Enterprise PowerPoint (versions below 16.0.20326.20136) is possible via a use-after-free (CWE-416) triggered when a user opens a specially crafted PowerPoint file. The CVSS 8.8 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects full CIA impact achievable without attacker authentication, requiring only that the victim opens a malicious document. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must open or load-preview a specially crafted PowerPoint file using an affected version of Microsoft 365 Apps for Enterprise (build < 16.0.20326.20136) on a supported Windows platform; this is confirmed by the CVSS UI:R metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score with a full-impact vector (C:H/I:H/A:H) accurately reflects the severity of a successful exploitation: arbitrary code execution under the victim's user context. … 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 | Apply the vendor-released patch by updating Microsoft 365 Apps for Enterprise to build 16.0.20326.20136 or later through Microsoft Update, Windows Update for Business, or the Microsoft 365 admin center's update deployment channels. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Microsoft 365 Apps for Enterprise PowerPoint installations across your environment and prioritize endpoints where users regularly receive external documents. …
Sign in for detailed remediation steps and compensating controls.
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
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External POC / Exploit Code
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