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Description

Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

PUBLISHED Reserved 2026-05-07 | Published 2026-06-09 | Updated 2026-06-10 | Assigner microsoft




HIGH: 7.0CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Problem types

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Product status

16.0.1 (custom) before https://aka.ms/OfficeSecurityReleases
affected

16.0.0.0 (custom) before 16.0.5556.1001
affected

19.0.0 (custom) before https://aka.ms/OfficeSecurityReleases
affected

-
affected

16.0.1 (custom) before https://aka.ms/OfficeSecurityReleases
affected

16.0.0 (custom) before https://aka.ms/OfficeSecurityReleases
affected

-
affected

-
affected

16.0.0.0 (custom) before 16.0.10417.20137
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44818 (Microsoft Excel Remote Code Execution Vulnerability) vendor-advisory patch

cve.org (CVE-2026-44818)

nvd.nist.gov (CVE-2026-44818)

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