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CVE-2026-119993— Microsoft Office Outlook Information Disclosure Vulnerability

Quick assessment

Affected
Microsoft Microsoft 365 Apps for Enterprise
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Microsoft Office Outlook 中，由于使用了不兼容的类型访问资源（即“类型混淆”），攻击者可未经授权通过网络泄露信息。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
Microsoft Microsoft 365 Apps for Enterprise 16.0.1< https://aka.ms/OfficeSecurityReleases affected
Microsoft Microsoft Office LTSC 2021 16.0.1< 16.0.14334.21048 affected
Microsoft Microsoft Office LTSC 2024 16.0.0< 16.0.17932.21140 affected
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I. Basic Information for CVE-2026-119993

Vulnerability Information
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Vulnerability Title
Microsoft Office Outlook Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Access of resource using incompatible type ('type confusion') in Microsoft Office Outlook allows an unauthorized attacker to disclose information over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不兼容类型访问资源(类型混淆)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft 365 Apps for Enterprise 16.0.1 ~ https://aka.ms/OfficeSecurityReleases -
Microsoft Microsoft Office LTSC 2021 16.0.1 ~ 16.0.14334.21048 -
Microsoft Microsoft Office LTSC 2024 16.0.0 ~ 16.0.17932.21140 -

II. Public POCs for CVE-2026-119993

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III. Intelligence Information for CVE-2026-119993

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Vendor Advisories for CVE-2026-119993 (1)

Same Patch Batch · Microsoft · 2026-11-10 · 1094 CVEs total

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Showing top 20 of 1094 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Microsoft 365 Apps for Enterprise
Same vendor: Microsoft
Same weakness: CWE-843