CVE-2026-70125

Analyzed Analyzed - Analysis Complete

Microsoft Outlook Remote Code Execution Vulnerability

Publication date: 2026-09-23

Last updated on: 2026-10-05

Assigner: Microsoft Corporation

Description

Microsoft Office Outlook Remote Code Execution Vulnerability

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-23

Last Modified

2026-10-05

Generated

2026-10-14

AI Q&A

2026-09-24

EPSS Evaluated

2026-10-13

NVD

CVE-2026-70125

EUVD

EUVD-2026-85727

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This is a remote code execution vulnerability in Microsoft Outlook. It allows an attacker to execute arbitrary code on a victim's system by exploiting flaws in how Outlook processes certain inputs or files. The vulnerability has a high severity score due to its potential impact on confidentiality, integrity, and availability of the affected system.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run malicious code on your computer without your interaction. This could lead to unauthorized access to sensitive data, installation of malware, or control over your system. Attackers might use phishing emails or malicious attachments to trigger the exploit.

Compliance Impact

This vulnerability could lead to data breaches, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Organizations using Outlook may face fines or penalties if they fail to protect personal or health data due to this vulnerability. Immediate patching and mitigation are critical to maintain compliance.

Mitigation Strategies

Apply the latest security updates from Microsoft for Outlook as soon as possible to patch this vulnerability.

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