CVE-2026-105718

Published: Oct 13, 2026Modified: Oct 15, 2026

8.8

Vector

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

Exploitability: 2.8 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Affected (10)

Products: Microsoft: 365 Apps, Microsoft 365, Office 2021, Office 2024, Office Online Server

5 products

Office Online Server

Configuration A

10 vulnerable

Vulnerable Software	Affected Versions
Microsoft 365 Apps	All versions
Microsoft 365 Apps	All versions
Microsoft Microsoft 365	All versions
Microsoft Office 2021	All versions
Microsoft Office 2021	All versions
Microsoft Office 2021	All versions
Microsoft Office 2024	All versions
Microsoft Office 2024	All versions
Microsoft Office 2024	All versions
Microsoft Office Online Server	version < 16.0.10417.20228

Related CWEs

Out-of-bounds Read

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

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105718

Source: secure@microsoft.com

PatchVendor Advisory

Timeline

No history available yet.