CVE-2026-100208 - Vulnerability Details - OpenCVE

Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Vendors	Products
Microsoft Subscribe	365 Apps Subscribe Office 2021 Subscribe Office 2024 Subscribe

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100208

History

Fri, 25 Sep 2026 19:45:00 +0000

Type	Values Removed	Values Added
Description		Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Title		Microsoft Office Outlook Remote Code Execution Vulnerability
First Time appeared		Microsoft Microsoft 365 Apps Microsoft office 2021 Microsoft office 2024
Weaknesses		CWE-190
CPEs		cpe:2.3:a:microsoft:365_apps:::::enterprise:::* cpe:2.3:a:microsoft:office_2021:::::long_term_servicing_channel:::* cpe:2.3:a:microsoft:office_2024:::::long_term_servicing_channel:::*
Vendors & Products		Microsoft Microsoft 365 Apps Microsoft office 2021 Microsoft office 2024
References		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100208
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-09-25T19:39:27.315Z

Updated: 2026-09-25T20:03:49.495Z

Reserved: 2026-09-25T15:11:44.539Z

Link: CVE-2026-100208

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-09-25T20:17:04.760

Modified: 2026-09-25T20:17:04.760

Link: CVE-2026-100208

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-190

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