Description
Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
Published: 2026-09-08
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

This vulnerability is a use‑after‑free flaw in Microsoft Office PowerPoint that allows an attacker to execute arbitrary code on a target machine. The flaw can be triggered from a malicious PowerPoint file delivered over a network, enabling the attacker to gain control of the system. The weakness is classified as CWE-416.

Affected Systems

Affected software includes Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 2021, Microsoft Office 2024, Microsoft Office 365 for Mac, Microsoft Office LTSC 2021, Microsoft Office LTSC 2024, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024, and Microsoft PowerPoint 2016. Specific version numbers are not listed in the advisory, so all current releases within those product families are potentially vulnerable unless patched.

Risk and Exploitability

The CVSS score of 8.8 indicates high severity. The EPSS score is not available, and the vulnerability is not listed in the CISA KEV catalog. The likely attack vector is a network‑based attacker delivering a crafted PowerPoint file to a user’s machine; exploitation requires that the file is opened or processed by PowerPoint.

Generated by OpenCVE AI on September 9, 2026 at 23:23 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Install the latest Office security update that contains the fix for this use‑after‑free flaw via Microsoft Update or the Microsoft Security Advisory link provided.
  • Until the update is applied, restrict network access to the target machine or isolate it from shared locations that may host malicious PowerPoint files.
  • Continuously monitor logs for unusual activity such as unexpected execution of PowerPoint or outbound connections originating from the application to detect any covert exploitation attempts.

Generated by OpenCVE AI on September 9, 2026 at 23:23 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Wed, 09 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 09 Sep 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft microsoft 365
Microsoft powerpoint
CPEs cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*
cpe:2.3:a:microsoft:powerpoint:2016:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:powerpoint:2016:*:*:*:*:*:x86:*
Vendors & Products Microsoft microsoft 365
Microsoft powerpoint

Tue, 08 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Description Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
Title Microsoft Office PowerPoint Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft 365 Apps
Microsoft office 2019
Microsoft office 2021
Microsoft office 2024
Microsoft office 365
Microsoft office Macos 2021
Microsoft office Macos 2024
Microsoft powerpoint 2016
Weaknesses CWE-416
CPEs cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:office_2019:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*
cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*
cpe:2.3:a:microsoft:office_365:*:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_macos_2021:*:*:*:*:*:long_term_servicing_channel:*:*
cpe:2.3:a:microsoft:office_macos_2024:*:*:*:*:*:long_term_servicing_channel:*:*
cpe:2.3:a:microsoft:powerpoint_2016:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft 365 Apps
Microsoft office 2019
Microsoft office 2021
Microsoft office 2024
Microsoft office 365
Microsoft office Macos 2021
Microsoft office Macos 2024
Microsoft powerpoint 2016
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}


Subscriptions

Microsoft 365 Apps Microsoft 365 Office 2019 Office 2021 Office 2024 Office 365 Office Macos 2021 Office Macos 2024 Powerpoint Powerpoint 2016
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-09-25T21:32:56.062Z

Reserved: 2026-08-03T21:28:58.727Z

Link: CVE-2026-69678

cve-icon Vulnrichment

Updated: 2026-09-09T10:01:18.922Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-08T18:19:39.327

Modified: 2026-09-17T20:17:43.927

Link: CVE-2026-69678

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-09T23:30:09Z

Weaknesses