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MicrosoftCVE-2026-68807

Microsoft Office 365 for Mac: heap buffer overflow

Microsoft

CVE-2026-68807 · Published Aug 11, 2026 · updated Oct 28, 2026

High7.8
Fix: upgrade to 16.112.26081010 or later
Microsoft advisory

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

Affected versions

PackageAffectedFixed in
Microsoft Office 365 for Mac
Product
>= 1.0.0, < 16.112.2608101016.112.26081010

Changes since it was listed

Fixed inNov 3Fixed in: Microsoft 365 Apps for Enterprise https://aka.ms/OfficeSecurityReleases, Microsoft Excel 2016 16.0.5565.1001, Microsoft to Microsoft Office 365 for Mac 16.112.26081010
Details and references
CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-122

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