CVE-2026-26107

HIGH

Microsoft Office Excel - Use After Free

Title source: llm

Description

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

References (1)

[Vendor Advisory] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26107

Scores

CVSS v3 7.8

EPSS 0.0006

EPSS Percentile 17.9%

Attack Vector LOCAL

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

Classification

CWE

CWE-416

Status published

Affected Products (13)

microsoft/365_apps

microsoft/365_apps

microsoft/excel

microsoft/excel

microsoft/office

microsoft/office

microsoft/office_long_term_servicing_channel

microsoft/office_long_term_servicing_channel

microsoft/office_long_term_servicing_channel

microsoft/office_long_term_servicing_channel

microsoft/office_long_term_servicing_channel

microsoft/office_long_term_servicing_channel

microsoft/office_online_server < 16.0.10417.20102

Timeline

Published Mar 10, 2026

Tracked Since Mar 11, 2026