CVE-2026-58651 - Vulnerability Details - OpenCVE

Heap-based buffer overflow in Microsoft Office Word 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 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-2026-58651

History

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

Type	Values Removed	Values Added
Description		Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Title		Microsoft Word 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-122
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		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58651
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: 2026-08-11T17:05:42.656Z

Updated: 2026-08-11T18:50:46.576Z

Reserved: 2026-07-01T21:14:44.620Z

Link: CVE-2026-58651

Vulnrichment

No data.

NVD

Status : Awaiting Analysis

Published: 2026-08-11T17:18:05.550

Modified: 2026-08-11T18:53:55.320

Link: CVE-2026-58651

Redhat

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OpenCVE Enrichment

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