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CVE-2026-119855— Windows COM+ Event System Service Information Disclosure Vulnerability

Quick assessment

Affected
Microsoft Windows 10 Version 1607
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.

Windows COM+ 事件系统服务中存在缓冲区读取越界漏洞，允许已授权的攻击者在本地泄露信息。

CVSS 5.5 · Medium

Possible ATT&CK Techniques 1 AI

T1040 · Network Sniffing

Affected Version Matrix 17

VendorProduct Version RangeStatus
Microsoft Windows 10 Version 1607 10.0.14393.0< 10.0.14393.9688 affected
Microsoft Windows 10 Version 1809 10.0.17763.0< 10.0.17763.9487 affected
Microsoft Windows 10 Version 21H2 10.0.19044.0< 10.0.19044.7846 affected
Microsoft Windows 10 Version 22H2 10.0.19045.0< 10.0.19045.7846 affected
Microsoft Windows 11 version 23H2 10.0.22631.0< 10.0.22631.7711 affected
Microsoft Windows 11 Version 23H2 10.0.22631.0< 10.0.22631.7711 affected
Microsoft Windows 11 Version 24H2 10.0.26100.0< 10.0.26100.9974 affected
Microsoft Windows 11 Version 25H2 10.0.26200.0< 10.0.26200.9974 affected
Microsoft Windows 11 version 26H1 10.0.28000.0< 10.0.28000.3501 affected
Microsoft Windows 11 Version 26H2 10.0.26300.0< 10.0.26300.9974 affected
Microsoft Windows Server 2016 10.0.14393.0< 10.0.14393.9688 affected
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0< 10.0.14393.9688 affected
Microsoft Windows Server 2019 10.0.17763.0< 10.0.17763.9487 affected
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0< 10.0.17763.9487 affected
Microsoft Windows Server 2022 10.0.20348.0< 10.0.20348.5870 affected
Microsoft Windows Server 2025 10.0.26100.0< 10.0.26100.33822 affected
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0< 10.0.26100.33822 affected
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I. Basic Information for CVE-2026-119855

Vulnerability Information
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Vulnerability Title
Windows COM+ Event System Service Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Buffer over-read in Windows COM+ Event System Service allows an authorized attacker to disclose information locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区上溢读取
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows 10 Version 1607 10.0.14393.0 ~ 10.0.14393.9688 -
Microsoft Windows 10 Version 1809 10.0.17763.0 ~ 10.0.17763.9487 -
Microsoft Windows 10 Version 21H2 10.0.19044.0 ~ 10.0.19044.7846 -
Microsoft Windows 10 Version 22H2 10.0.19045.0 ~ 10.0.19045.7846 -
Microsoft Windows 11 version 23H2 10.0.22631.0 ~ 10.0.22631.7711 -
Microsoft Windows 11 Version 23H2 10.0.22631.0 ~ 10.0.22631.7711 -
Microsoft Windows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.9974 -
Microsoft Windows 11 Version 25H2 10.0.26200.0 ~ 10.0.26200.9974 -
Microsoft Windows 11 version 26H1 10.0.28000.0 ~ 10.0.28000.3501 -
Microsoft Windows 11 Version 26H2 10.0.26300.0 ~ 10.0.26300.9974 -
Microsoft Windows Server 2016 10.0.14393.0 ~ 10.0.14393.9688 -
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 ~ 10.0.14393.9688 -
Microsoft Windows Server 2019 10.0.17763.0 ~ 10.0.17763.9487 -
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 ~ 10.0.17763.9487 -
Microsoft Windows Server 2022 10.0.20348.0 ~ 10.0.20348.5870 -
Microsoft Windows Server 2025 10.0.26100.0 ~ 10.0.26100.33822 -
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.33822 -

II. Public POCs for CVE-2026-119855

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III. Intelligence Information for CVE-2026-119855

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Vendor Advisories for CVE-2026-119855 (1)

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

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CVE-2026-96157 9.8 CRITICAL Microsoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2026-112967 9.8 CRITICAL Windows Xbox Live Networking Service Remote Code Execution Vulnerability
CVE-2026-114160 9.8 CRITICAL Azure Managed Grafana Elevation of Privilege Vulnerability
CVE-2026-119990 9.8 CRITICAL Azure OpenAI Elevation of Privilege Vulnerability
CVE-2026-116928 9.8 CRITICAL Windows Search Remote Code Execution Vulnerability
CVE-2026-119958 9.8 CRITICAL Windows LDAP - Lightweight Directory Access Protocol Remote Code Execution Vulnerability
CVE-2026-116945 9.8 CRITICAL Microsoft SQL Server Remote Code Execution Vulnerability
CVE-2026-120779 9.6 CRITICAL Visual Studio Code Remote Code Execution Vulnerability
CVE-2026-118740 9.1 CRITICAL Aspire Security Feature Bypass Vulnerability

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

IV. Related Vulnerabilities

Same product: Windows 10 Version 1607
Same vendor: Microsoft
Same weakness: CWE-126