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High severity7.8NVD Advisory· Published Jul 14, 2026· Updated Jul 16, 2026

CVE-2026-55037

CVE-2026-55037

Description

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected products

15
  • 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:-:*
  • Microsoft/Office Online Server
    cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:*
    Range: <16.0.10417.20175

Patches

Vulnerability mechanics

References

1

News mentions

0

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