CVE-2026-26144

HIGH

Microsoft 365 Apps for Enterprise - Cross-Site Scripting in Excel

Title source: llm

Description

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

References (1)

Core 1

Core References

Vendor Advisory vendor-advisory patch

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26144

Scores

CVSS v3 7.5

EPSS 0.0012

EPSS Percentile 30.3%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (2)

microsoft/365_apps (2 CPE variants)

Microsoft/Microsoft 365 Apps for Enterprise 16.0.1 - https://aka.ms/OfficeSecurityReleases

Published Mar 10, 2026

Tracked Since Mar 11, 2026