CVE-2026-70329 - 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 Low

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.

Exploitation none

Automatable no

Technical Impact total

Vendors	Products
Microsoft	365 Apps Office 2019 Office 2021 Office 2024 Outlook 2016

No data.

No data.

No data.

References

Link	Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70329

History

Tue, 11 Aug 2026 20:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 11 Aug 2026 17:15:00 +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 Outlook Remote Code Execution Vulnerability
First Time appeared		Microsoft Microsoft 365 Apps Microsoft office 2019 Microsoft office 2021 Microsoft office 2024 Microsoft outlook 2016
Weaknesses		CWE-190
CPEs		cpe:2.3:a:microsoft:365_apps:::::enterprise:::* cpe:2.3:a:microsoft:office_2019:::::::: cpe:2.3:a:microsoft:office_2021:::::long_term_servicing_channel:::* cpe:2.3:a:microsoft:office_2024:::::long_term_servicing_channel:::* cpe:2.3:a:microsoft:outlook_2016::::::x86::*
Vendors & Products		Microsoft Microsoft 365 Apps Microsoft office 2019 Microsoft office 2021 Microsoft office 2024 Microsoft outlook 2016
References		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70329
Metrics		cvssV3_1 `{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}`

MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-08-11T17:05:30.497Z

Updated: 2026-08-12T03:58:43.934Z

Reserved: 2026-08-04T00:01:20.934Z

Link: CVE-2026-70329

Vulnrichment

Updated: 2026-08-11T19:21:24.207Z

NVD

Status : Undergoing Analysis

Published: 2026-08-11T17:19:10.777

Modified: 2026-08-12T05:19:49.807

Link: CVE-2026-70329

Redhat

No data.

OpenCVE Enrichment

No data.

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