CVE-2026-45460: Microsoft 365 Apps

Medium severity, CVSS 4.7. EPSS: 0.4% chance of exploitation in the next 30 days.

Buffer over-read in Microsoft Office allows an unauthorized attacker to disclose information locally.

Affected products

• Microsoft 365 Apps: affected versions not specified
• Microsoft 365 Copilot: affected versions not specified
• Microsoft Microsoft 365: affected versions not specified
• Microsoft Office 2019: affected versions not specified
• Microsoft Office 2021: affected versions not specified
• Microsoft Office 2024: affected versions not specified

Published 2026-06-09. Last modified 2026-07-23.