ReviewHigh

CVE-2026-70313

Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 365 for Mac

Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.

PRIORITY ASSESSMENT

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability-

Technical severityCVSS 7.8

Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.

Product: Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 365 for Mac
Affected versions: >= 16.0.1 < https://aka.ms/OfficeSecurityReleases, >= 19.0.0 < https://aka.ms/OfficeSecurityReleases, >= 1.0.0 < 16.112.26081010, >= 16.0.0 < https://aka.ms/OfficeSecurityReleases, >= 16.0.1 < 16.112.26081010, >= 16.0.0 < 16.112.26081010
Fixed versions: No verified fixed-version field is available yet

Confirm exposure before applying a vendor-supported change.

1
Identify
Confirm that Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 365 for Mac and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.