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CVE-2026-55122— Microsoft Excel Information Disclosure Vulnerability

CVSS 7.1 · High EPSS 0.34% · P26

Affected Version Matrix 9

VendorProductVersion RangeStatus
MicrosoftMicrosoft 365 Apps for Enterprise16.0.1< https://aka.ms/OfficeSecurityReleasesaffected
MicrosoftMicrosoft Excel 201616.0.0.0< 16.0.5561.1001affected
MicrosoftMicrosoft Office 201919.0.0< https://aka.ms/OfficeSecurityReleasesaffected
MicrosoftMicrosoft Office 365 for Mac1.0.0< 16.111.26071215affected
MicrosoftMicrosoft Office LTSC 202116.0.1< https://aka.ms/OfficeSecurityReleasesaffected
MicrosoftMicrosoft Office LTSC 202416.0.0< https://aka.ms/OfficeSecurityReleasesaffected
MicrosoftMicrosoft Office LTSC for Mac 202116.0.1< 16.111.26071215affected
MicrosoftMicrosoft Office LTSC for Mac 202416.0.0< 16.111.26071215affected
MicrosoftOffice Online Server16.0.0.0< 16.0.10417.20175affected
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I. Basic Information for CVE-2026-55122

Vulnerability Information
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Vulnerability Title
Microsoft Excel Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Office Excel 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Office Excel是美国Microsoft公司的一款电子表格软件。 Microsoft Office Excel存在缓冲区错误漏洞，该漏洞源于越界读取，可能导致未经授权的攻击者在本地泄露信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
MicrosoftMicrosoft 365 Apps for Enterprise 16.0.1 ~ https://aka.ms/OfficeSecurityReleases -
MicrosoftMicrosoft Excel 2016 16.0.0.0 ~ 16.0.5561.1001 -
MicrosoftMicrosoft Office 2019 19.0.0 ~ https://aka.ms/OfficeSecurityReleases -
MicrosoftMicrosoft Office 365 for Mac 1.0.0 ~ 16.111.26071215 -
MicrosoftMicrosoft Office LTSC 2021 16.0.1 ~ https://aka.ms/OfficeSecurityReleases -
MicrosoftMicrosoft Office LTSC 2024 16.0.0 ~ https://aka.ms/OfficeSecurityReleases -
MicrosoftMicrosoft Office LTSC for Mac 2021 16.0.1 ~ 16.111.26071215 -
MicrosoftMicrosoft Office LTSC for Mac 2024 16.0.0 ~ 16.111.26071215 -
MicrosoftOffice Online Server 16.0.0.0 ~ 16.0.10417.20175 -

II. Public POCs for CVE-2026-55122

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III. Intelligence Information for CVE-2026-55122

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Vendor Advisories for CVE-2026-55122 (1)

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Showing top 20 of 570 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Microsoft 365 Apps for Enterprise
Same vendor: Microsoft
Same weakness: CWE-125

V. Comments for CVE-2026-55122

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