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High severity8.8NVD Advisory· Published Aug 11, 2026· Updated Aug 13, 2026

CVE-2026-65807

CVE-2026-65807

Description

Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Affected products

14
  • Microsoft/Office Excelllm-fuzzy
  • Microsoft/365 Apps2 versions
    cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*+ 1 more
    • cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
    • cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
  • Microsoft/Excel2 versions
    cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*+ 1 more
    • cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*
    • cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:*
  • Microsoft/Microsoft 365
    cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*
  • Microsoft/Office8 versions
    cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*+ 7 more
    • cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*
    • cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:*
    • cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
    • cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
    • cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*
    • cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
    • cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*
    • cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*

Patches

Vulnerability mechanics

References

1

News mentions

2