CVE-2026-44818High· 7.0▾ TwilightConcurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.3%
Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
365_apps_for_enterprise >= 16.0.1 < https://aka.ms/OfficeSecurityReleasesexcel_2016 >= 16.0.0.0 < 16.0.5556.1001office_2019 >= 19.0.0 < https://aka.ms/OfficeSecurityReleasesoffice_365_for_mac >= 1.0.0 < 16.110.26061317office_ltsc_2021 >= 16.0.1 < https://aka.ms/OfficeSecurityReleasesoffice_ltsc_2024 >= 16.0.0 < https://aka.ms/OfficeSecurityReleasesoffice_ltsc_for_mac_2021 >= 16.0.1 < 16.110.26061317office_ltsc_for_mac_2024 >= 16.0.0 < 16.110.26061317office_online_server >= 16.0.0.0 < 16.0.10417.20137Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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