CVE-2026-26144

Microsoft Excel Information Disclosure Vulnerability

Published Mar 10, 2026 CVSS 3.1 · 7.5 High EPSS 1.4% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Microsoft Excel Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft 365 Apps
Weaknesses CWE-79
CPEs cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*
Vendors & Products Microsoft
Microsoft 365 Apps
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Jun 19, 2026, 6:18 PM
Reserved
Feb 11, 2026, 4:24 PM
Status
Analyzed
Published
Mar 10, 2026, 6:18 PM
Modified
Jun 17, 2026, 10:25 AM