CVE-2026-42832: Microsoft Excel

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper access control in Microsoft Office allows an unauthorized attacker to perform spoofing locally.

Affected products

• Microsoft Excel: before 16.0.19822.20190 (fixed in 16.0.19822.20190)
• Microsoft Office: version 2024 only
• Microsoft Office Long Term Servicing Channel: version 2021 only
• Microsoft Word: before 16.0.19822.20190 (fixed in 16.0.19822.20190)

Published 2026-05-12. Last modified 2026-06-17.