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7.8
HIGH CVSS 3.1
CVE-2026-55022
Microsoft Office Remote Code Execution Vulnerability
Overview
Description

Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.

Details
INFO

Published Date :

July 14, 2026, 6:18 p.m.

Last Modified :

July 16, 2026, 3:27 p.m.

Remotely Exploit :

No

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-55022 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Microsoft 365_apps
2 Microsoft office_365
3 Microsoft office_macos_2024
4 Microsoft office_macos_2021
5 Microsoft office_2016
6 Microsoft office_2024
7 Microsoft office_2021
8 Microsoft office_2019
9 Microsoft microsoft_365
: Total Affected Vendor : 1 | Products : 9
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 HIGH f38d906d-7342-40ea-92c1-6c4a2c6478c8
CVSS 3.1 HIGH [email protected]
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-55022.

URL Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55022 Patch Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-55022 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-55022 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-55022 vulnerability anywhere in the article.

  • CrowdStrike.com
July 2026 Patch Tuesday: Microsoft Patches 622 Vulnerabilities Including Two Exploited Zero-Days

Microsoft has addressed 622 vulnerabilities in its July 2026 security update release. Based on CrowdStrike’s analysis, this represents roughly triple the number of vulnerabilities in June, and almost ... Read more

Published Date: Jul 15, 2026 (6 days, 14 hours ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-55022 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jul. 16, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:* *cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:* *cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:* *cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:* *cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x64:* *cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x86:* *cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:* *cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:* *cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:* *cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:* *cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:* *cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:* *cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*
    Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55022 Types: Patch, Vendor Advisory
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jul. 15, 2026

    Action Type Old Value New Value
    Changed SSVC {'id': 'CVE-2026-55022', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-10T00:00:00+00:00'} {'id': 'CVE-2026-55022', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-15T03:56:38.630194Z'}
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jul. 15, 2026

    Action Type Old Value New Value
    Added SSVC {'id': 'CVE-2026-55022', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-10T00:00:00+00:00'}
  • New CVE Received by [email protected]

    Jul. 14, 2026

    Action Type Old Value New Value
    Added Affected [{'vendor': 'Microsoft', 'product': 'Microsoft 365 Apps for Enterprise', 'versions': [{'status': 'affected', 'version': '16.0.1', 'lessThan': 'https://aka.ms/OfficeSecurityReleases', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'x64-based Systems']}, {'vendor': 'Microsoft', 'product': 'Microsoft Office 2016', 'versions': [{'status': 'affected', 'version': '16.0.0', 'lessThan': '16.0.5561.1000', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'x64-based Systems']}, {'vendor': 'Microsoft', 'product': 'Microsoft Office 2019', 'versions': [{'status': 'affected', 'version': '19.0.0', 'lessThan': 'https://aka.ms/OfficeSecurityReleases', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'x64-based Systems']}, {'vendor': 'Microsoft', 'product': 'Microsoft Office 365 for Mac', 'versions': [{'status': 'affected', 'version': '1.0.0', 'lessThan': '16.111.26071215', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': 'Microsoft Office LTSC 2021', 'versions': [{'status': 'affected', 'version': '16.0.1', 'lessThan': 'https://aka.ms/OfficeSecurityReleases', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'x64-based Systems']}, {'vendor': 'Microsoft', 'product': 'Microsoft Office LTSC 2024', 'versions': [{'status': 'affected', 'version': '16.0.0', 'lessThan': 'https://aka.ms/OfficeSecurityReleases', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'x64-based Systems']}, {'vendor': 'Microsoft', 'product': 'Microsoft Office LTSC for Mac 2021', 'versions': [{'status': 'affected', 'version': '16.0.1', 'lessThan': '16.111.26071215', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': 'Microsoft Office LTSC for Mac 2024', 'versions': [{'status': 'affected', 'version': '16.0.0', 'lessThan': '16.111.26071215', 'versionType': 'custom'}]}]
    Added Description Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
    Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Added CWE CWE-843
    Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55022
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact