CVE-2026-55130 - 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 2019 Office 2021 Office 2024 Sharepoint Server Sharepoint Server 2016 Sharepoint Server 2019 Word 2016

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References

Link	Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55130

History

Tue, 14 Jul 2026 17:45:00 +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 2019 Microsoft office 2021 Microsoft office 2024 Microsoft sharepoint Server Microsoft sharepoint Server 2016 Microsoft sharepoint Server 2019 Microsoft word 2016
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:sharepoint_server:::::subscription:::* cpe:2.3:a:microsoft:sharepoint_server_2016:::::enterprise:::* cpe:2.3:a:microsoft:sharepoint_server_2019:::::::: cpe:2.3:a:microsoft:word_2016::::::::
Vendors & Products		Microsoft Microsoft 365 Apps Microsoft office 2019 Microsoft office 2021 Microsoft office 2024 Microsoft sharepoint Server Microsoft sharepoint Server 2016 Microsoft sharepoint Server 2019 Microsoft word 2016
References		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55130
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: 2026-07-14T17:09:02.968Z

Updated: 2026-07-14T18:46:11.945Z

Reserved: 2026-06-16T15:03:49.681Z

Link: CVE-2026-55130

Vulnrichment

No data.

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

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