CVE-2026-65664 - Vulnerability Details - OpenCVE

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Vendors	Products
Microsoft	365 Apps Office 2019 Office 2021 Office 2024 Office 365 Office Macos 2021 Office Macos 2024

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References

Link	Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65664

History

Tue, 11 Aug 2026 17:15:00 +0000

Type	Values Removed	Values Added
Description		Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Title		Microsoft Office Graphics Component 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
Weaknesses		CWE-122
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::*
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
References		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65664
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}`

MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-08-11T17:04:56.224Z

Updated: 2026-08-11T23:59:00.900Z

Reserved: 2026-07-22T18:16:01.897Z

Link: CVE-2026-65664

Vulnrichment

No data.

NVD

Status : Awaiting Analysis

Published: 2026-08-11T17:18:54.633

Modified: 2026-08-11T18:53:42.910

Link: CVE-2026-65664

Redhat

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OpenCVE Enrichment

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