CVE-2026-64918
Microsoft Office Spoofing Vulnerability
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.
| Vendor | microsoft |
| Product | microsoft 365 apps for enterprise |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Sep 8, 2026 |
| Last Updated | Sep 15, 2026 |
Stay Ahead of the Next One
Get instant alerts for microsoft microsoft 365 apps for enterprise
Be the first to know when new medium vulnerabilities affecting microsoft microsoft 365 apps for enterprise are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Microsoft 365 Apps for Enterprise
16.0.1 < https://aka.ms/OfficeSecurityReleases
Microsoft / Microsoft Office 2016
16.0.0 < 16.0.5569.1003
Microsoft / Microsoft Office 2019
19.0.0 < https://aka.ms/OfficeSecurityReleases
Microsoft / Microsoft Office LTSC 2021
16.0.1 < https://aka.ms/OfficeSecurityReleases
Microsoft / Microsoft Office LTSC 2024
16.0.0 < https://aka.ms/OfficeSecurityReleases