CVE-2026-124229
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Microsoft Excel Deserialization Code Execution Vulnerability
Vulnerability report for CVE-2026-124229, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-10
Last updated on: 2026-11-10
Assigner: Microsoft Corporation
Description
Description
Deserialization of untrusted data in Microsoft Office Excel allows an unauthorized attacker to execute code with a physical attack.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Microsoft | Microsoft Office 365 for Mac | From 1.0.0 (inc) to 16.115.26110837 (exc) |
| Microsoft | Microsoft Office LTSC 2021 | From 16.0.1 (inc) to 16.0.14334.21048 (exc) |
| Microsoft | Microsoft Office LTSC 2024 | From 16.0.0 (inc) to 16.0.17932.21140 (exc) |
| Microsoft | Microsoft Office LTSC for Mac 2021 | From 16.0.1 (inc) to 16.115.26110837 (exc) |
| Microsoft | Microsoft Office LTSC for Mac 2024 | From 16.0.0 (inc) to 16.115.26110837 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-502 | The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. |
