MEDIUM 6.1 Microsoft
CVE-2026-55898
Microsoft Excel Information Disclosure Vulnerability
Microsoft Security Update 2026-Jul: Microsoft Excel Information Disclosure Vulnerability
Affected Products
- Microsoft Office 365 for Mac
- Office Online Server
- Microsoft Office 2019 for 32-bit editions
- Microsoft Office 2019 for 64-bit editions
- Microsoft 365 Apps for Enterprise for 32-bit Systems
- Microsoft 365 Apps for Enterprise for 64-bit Systems
- Microsoft Office LTSC for Mac 2021
- Microsoft Office LTSC 2021 for 64-bit editions
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55898
- https://nvd.nist.gov/vuln/detail/CVE-2026-55898
This medium severity vulnerability with a CVSS score of 6.1 was published on 2026-07-14 via Microsoft. Affected: Microsoft Office 365 for Mac, Office Online Server, Microsoft Office 2019 for 32-bit editions and 5 more.
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