CVE-2026-45459HighCVSS 3.3
Microsoft Excel Security Feature Bypass Vulnerability
🔗 CVE IDs covered (1)
📋 Description
Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
🎯 Affected products7
- Microsoft 365 Apps for Enterprise for 32-bit Systems
- Microsoft 365 Apps for Enterprise for 64-bit Systems
- Microsoft Office 365 for Mac
- Microsoft Office LTSC 2024 for 32-bit editions
- Microsoft Office LTSC 2024 for 64-bit editions
- Microsoft Office LTSC for Mac 2021
- Microsoft Office LTSC for Mac 2024
✅ Remediation
KBClick to Run (Security Update) — fixed build https://aka.ms/OfficeSecurityReleases KBRelease Notes (Security Update) — fixed build 16.110.26061317
🔗 References (4)
- advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45459
- referencehttps://docs.microsoft.com/en-us/officeupdates/office365-proplus-security-updates
- patchhttps://go.microsoft.com/fwlink/p/?linkid=831049
- patchhttps://www.microsoft.com/en-us/microsoft-365/mac/microsoft-365-for-mac?msockid=35f9adb0e74b61392038b90de6fe608c