CVE-2026-55050

Published: Jul 14, 2026Modified: Jul 16, 2026

5.5

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploitability: 1.8 / Impact: 3.6

Source: secure@microsoft.com (Secondary)

Description

Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

Affected (17)

Products: Microsoft: 365 Apps, Microsoft 365, Office 2019, Office 2021, Office 2024, Office Online Server, Sharepoint Server, Word

8 products

Office Online Server

Sharepoint Server

Configuration A

17 vulnerable

Vulnerable Software	Affected Versions
Microsoft 365 Apps	All versions
Microsoft 365 Apps	All versions
Microsoft Microsoft 365	All versions
Microsoft Office 2019	All versions
Microsoft Office 2019	All versions
Microsoft Office 2021	version < 16.111.26071215
Microsoft Office 2021	All versions
Microsoft Office 2021	All versions
Microsoft Office 2024	version < 16.111.26071215
Microsoft Office 2024	All versions
Microsoft Office 2024	All versions
Microsoft Office Online Server	version < 16.0.10417.20175
Microsoft Sharepoint Server	version < 16.0.19725.20434
Microsoft Sharepoint Server	Version 2016
Microsoft Sharepoint Server	Version 2019
Microsoft Word	Version 2016
Microsoft Word	Version 2016

Related CWEs

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55050

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.