LOW 3.3 Microsoft
CVE-2026-45455
Microsoft Excel Information Disclosure Vulnerability
Microsoft Security Update 2026-Jun: Microsoft Excel Information Disclosure Vulnerability
Affected Products
- 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
- Microsoft Office LTSC 2021 for 32-bit editions
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45455
- https://nvd.nist.gov/vuln/detail/CVE-2026-45455
This low severity vulnerability with a CVSS score of 3.3 was published on 2026-06-09 via Microsoft. Affected: Office Online Server, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions and 5 more.
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