Microsoft Office Excel Remote Code Execution Vulnerability

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-124229
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-10 19:20:50 UTC
Updated2026-11-10 19:20:50 UTC
DescriptionDeserialization of untrusted data in Microsoft Office Excel allows an unauthorized attacker to execute code with a physical attack.

Risk And Classification

Primary CVSS: v3.1 6.6 MEDIUM from [email protected]

CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem Types: CWE-502 | CWE-502 CWE-502: Deserialization of Untrusted Data

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.6MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNACVSS6.6MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

CVSS v3.1 Breakdown

Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft Microsoft 365 Apps For Enterprise affected 16.0.1 https://aka.ms/OfficeSecurityReleases custom 32-bit Systems, x64-based Systems
CNA Microsoft Microsoft Office 365 For Mac affected 1.0.0 16.115.26110837 custom Not specified
CNA Microsoft Microsoft Office LTSC 2021 affected 16.0.1 16.0.14334.21048 custom 32-bit Systems, x64-based Systems
CNA Microsoft Microsoft Office LTSC 2024 affected 16.0.0 16.0.17932.21140 custom 32-bit Systems, x64-based Systems
CNA Microsoft Microsoft Office LTSC For Mac 2021 affected 16.0.1 16.115.26110837 custom Not specified
CNA Microsoft Microsoft Office LTSC For Mac 2024 affected 16.0.0 16.115.26110837 custom Not specified

References

ReferenceSourceLinkTags
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-124229 [email protected] msrc.microsoft.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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