A tampering vulnerability exists when Microsoft Outlook does not properly handle specific attachment types when rendering HTML emails, aka "Microsoft Office Tampering Vulnerability." This affects Microsoft Word, Microsoft Office.
Severity
CVSS 3.0
7.5 high
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
5.9% chance of exploitation in the next 30 days; higher than 93% of CVEs (scores of 2026-10-31)