CVE-2026-123381
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Microsoft Outlook Stack-Based Buffer Overflow
Vulnerability report for CVE-2026-123381, 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
Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| 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) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-681 | When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur. |
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
