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CVE-2025-21245— Windows Telephony Service Remote Code Execution Vulnerability

Quick assessment

Affected
Microsoft Windows 10 Version 1507
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.

Microsoft Windows Telephony Server是美国微软（Microsoft）公司的一个组件，它支持电话应用程序编程接口（TAPI），允许计算机程序与共享的电话服务进行通信。 Microsoft Windows Telephony Server存在安全漏洞。攻击者利用该漏洞可以远程执行代码。以下产品和版本受到影响：Windows 10 Version 21H2 for 32-bit Systems,Windows 10 Version 21H2 for ARM64-based Sys

CVSS 8.8 · High EPSS 1.69% · P75

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 25

VendorProduct Version RangeStatus
Microsoft Windows 10 Version 1507 10.0.10240.0< 10.0.10240.20890 affected
Microsoft Windows 10 Version 1607 10.0.14393.0< 10.0.14393.7699 affected
Microsoft Windows 10 Version 1809 10.0.17763.0< 10.0.17763.6775 affected
Microsoft Windows 10 Version 21H2 10.0.19044.0< 10.0.19044.5371 affected
Microsoft Windows 10 Version 22H2 10.0.19045.0< 10.0.19045.5371 affected
Microsoft Windows 11 version 22H2 10.0.22621.0< 10.0.22621.4751 affected
Microsoft Windows 11 version 22H3 10.0.22631.0< 10.0.22631.4751 affected
Microsoft Windows 11 Version 23H2 10.0.22631.0< 10.0.22631.4751 affected
Microsoft Windows 11 Version 24H2 10.0.26100.0< 10.0.26100.2894 affected
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0< 6.1.7601.27520 affected
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0< 6.1.7601.27520 affected
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0< 6.0.6003.23070 affected
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0< 6.0.6003.23070 affected
Microsoft Windows Server 2012 6.2.9200.0< 6.2.9200.25273 affected
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0< 6.2.9200.25273 affected
Microsoft Windows Server 2012 R2 6.3.9600.0< 6.3.9600.22371 affected
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0< 6.3.9600.22371 affected
Microsoft Windows Server 2016 10.0.14393.0< 10.0.14393.7699 affected
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0< 10.0.14393.7699 affected
Microsoft Windows Server 2019 10.0.17763.0< 10.0.17763.6775 affected
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0< 10.0.17763.6775 affected
Microsoft Windows Server 2022 10.0.20348.0< 10.0.20348.3091 affected
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0< 10.0.25398.1369 affected
Microsoft Windows Server 2025 10.0.26100.0< 10.0.26100.2894 affected
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0< 10.0.26100.2894 affected
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I. Basic Information for CVE-2025-21245

Vulnerability Information
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Vulnerability Title
Windows Telephony Service Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Windows Telephony Service Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows Telephony Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Telephony Server是美国微软（Microsoft）公司的一个组件，它支持电话应用程序编程接口（TAPI），允许计算机程序与共享的电话服务进行通信。 Microsoft Windows Telephony Server存在安全漏洞。攻击者利用该漏洞可以远程执行代码。以下产品和版本受到影响：Windows 10 Version 21H2 for 32-bit Systems,Windows 10 Version 21H2 for ARM64-based Sys
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows 10 Version 1507 10.0.10240.0 ~ 10.0.10240.20890 -
Microsoft Windows 10 Version 1607 10.0.14393.0 ~ 10.0.14393.7699 -
Microsoft Windows 10 Version 1809 10.0.17763.0 ~ 10.0.17763.6775 -
Microsoft Windows 10 Version 21H2 10.0.19044.0 ~ 10.0.19044.5371 -
Microsoft Windows 10 Version 22H2 10.0.19045.0 ~ 10.0.19045.5371 -
Microsoft Windows 11 version 22H2 10.0.22621.0 ~ 10.0.22621.4751 -
Microsoft Windows 11 version 22H3 10.0.22631.0 ~ 10.0.22631.4751 -
Microsoft Windows 11 Version 23H2 10.0.22631.0 ~ 10.0.22631.4751 -
Microsoft Windows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.2894 -
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0 ~ 6.1.7601.27520 -
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 ~ 6.1.7601.27520 -
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0 ~ 6.0.6003.23070 -
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 ~ 6.0.6003.23070 -
Microsoft Windows Server 2012 6.2.9200.0 ~ 6.2.9200.25273 -
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 ~ 6.2.9200.25273 -
Microsoft Windows Server 2012 R2 6.3.9600.0 ~ 6.3.9600.22371 -
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 ~ 6.3.9600.22371 -
Microsoft Windows Server 2016 10.0.14393.0 ~ 10.0.14393.7699 -
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 ~ 10.0.14393.7699 -
Microsoft Windows Server 2019 10.0.17763.0 ~ 10.0.17763.6775 -
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 ~ 10.0.17763.6775 -
Microsoft Windows Server 2022 10.0.20348.0 ~ 10.0.20348.3091 -
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 ~ 10.0.25398.1369 -
Microsoft Windows Server 2025 10.0.26100.0 ~ 10.0.26100.2894 -
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.2894 -

II. Public POCs for CVE-2025-21245

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III. Intelligence Information for CVE-2025-21245

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Vendor Advisories for CVE-2025-21245 (1)

Same Patch Batch · Microsoft · 2025-01-14 · 157 CVEs total

CVE-2025-21298 9.8 CRITICAL Windows OLE Remote Code Execution Vulnerability
CVE-2025-21311 9.8 CRITICAL Windows NTLM V1 Elevation of Privilege Vulnerability
CVE-2025-21307 9.8 CRITICAL Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability
CVE-2025-21292 8.8 HIGH Windows Search Service Elevation of Privilege Vulnerability
CVE-2025-21266 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21282 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21293 8.8 HIGH Active Directory Domain Services Elevation of Privilege Vulnerability
CVE-2025-21291 8.8 HIGH Windows Direct Show Remote Code Execution Vulnerability
CVE-2025-21302 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21303 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21306 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21176 8.8 HIGH .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability
CVE-2025-21178 8.8 HIGH Visual Studio Remote Code Execution Vulnerability
CVE-2025-21273 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21238 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21417 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21240 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21250 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21223 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21409 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability

Showing top 20 of 157 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1507
Same vendor: Microsoft
Same weakness: CWE-122

V. Comments for CVE-2025-21245

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