Description
Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
Published: 2026-10-13
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

The vulnerability is a use‑after‑free bug in Microsoft Office PowerPoint that can cause arbitrary code execution. A memory management flaw lets an attacker trigger the bug through a malicious PowerPoint file or crafted network traffic, allowing them to run malicious code with the privileges of the launching process. The flaw falls under CWE‑416 and threatens confidentiality, integrity, and availability of affected systems.

Affected Systems

Affected are Microsoft 365 Apps for Enterprise, Microsoft Office 365 for Mac, Microsoft Office LTSC 2021, Microsoft Office LTSC 2024, Microsoft Office LTSC for Mac 2021, and Microsoft Office LTSC for Mac 2024. These are the long‑term servicing channel releases for Windows and macOS and are the versions targeting the current Microsoft 365 and LTSC updates that precede the patch published on the Microsoft security update guide.

Risk and Exploitability

The CVSS score of 8.8 indicates high severity, and the EPSS value is unknown, so the exploitation probability cannot be quantified. Microsoft has not listed this CVE in the CISA KEV catalog. It is likely that the exploit requires an attacker to deliver a crafted PowerPoint presentation or network packet to a vulnerable Office installation; therefore, defense should focus on restricting file access and ensuring timely updates.

Generated by OpenCVE AI on October 14, 2026 at 09:07 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Install the Microsoft Office update that addresses CVE-2026-88144 as soon as it is released.
  • Enable automatic updates for Office to receive the fix without manual intervention.
  • Until the patch is applied, use file blocking or sandboxing to prevent opening untrusted presentation files and consider disabling macros to reduce risk.

Generated by OpenCVE AI on October 14, 2026 at 09:07 UTC.

Tracking

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Advisories

No advisories yet.

History

Sun, 18 Oct 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft microsoft 365 Apps For Enterprise
Microsoft microsoft Office 365 For Mac
Microsoft microsoft Office Ltsc 2021
Microsoft microsoft Office Ltsc 2024
Microsoft microsoft Office Ltsc For Mac 2021
Microsoft microsoft Office Ltsc For Mac 2024
Vendors & Products Microsoft microsoft 365 Apps For Enterprise
Microsoft microsoft Office 365 For Mac
Microsoft microsoft Office Ltsc 2021
Microsoft microsoft Office Ltsc 2024
Microsoft microsoft Office Ltsc For Mac 2021
Microsoft microsoft Office Ltsc For Mac 2024

Thu, 15 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft microsoft 365
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_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:-:*
Vendors & Products Microsoft microsoft 365

Wed, 14 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 13 Oct 2026 19:15:00 +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 2021
Microsoft office 2024
Microsoft office 365
Microsoft office Macos 2021
Microsoft office Macos 2024
Weaknesses CWE-416
CPEs cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*
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:*:*
Vendors & Products Microsoft
Microsoft 365 Apps
Microsoft office 2021
Microsoft office 2024
Microsoft office 365
Microsoft office Macos 2021
Microsoft office Macos 2024
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 Microsoft 365 Apps For Enterprise 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 Office 2021 Office 2024 Office 365 Office Macos 2021 Office Macos 2024
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-31T18:10:46.685Z

Reserved: 2026-09-09T21:53:00.398Z

Link: CVE-2026-88144

cve-icon Vulnrichment

Updated: 2026-10-13T19:54:42.823Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-13T19:21:34.147

Modified: 2026-10-15T21:19:04.110

Link: CVE-2026-88144

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-18T09:30:14Z

Weaknesses