Read the docs
TI-2025-15307 Aliases CVE-2025-21339GHSA-2p5v-755j-54f5

Windows Telephony Service Remote Code Execution Vulnerability

Priority MEDIUM 42CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

Windows Telephony Service Remote Code Execution Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01123 66th percentileScored 2026-11-07
Fix Fixed Microsoft: 14 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftWindows 10 Version 150710.0.10240.0 to before 10.0.10240.2089010.0.10240.20890Patch availableCNA
MicrosoftWindows 10 Version 160710.0.14393.0 to before 10.0.14393.769910.0.14393.7699Patch availableCNA
MicrosoftWindows 10 Version 180910.0.17763.0 to before 10.0.17763.677510.0.17763.6775Patch availableCNA
MicrosoftWindows 10 Version 21H210.0.19044.0 to before 10.0.19044.537110.0.19044.5371Patch availableCNA
MicrosoftWindows 10 Version 22H210.0.19045.0 to before 10.0.19045.537110.0.19045.5371Patch availableCNA
MicrosoftWindows 11 version 22H210.0.22621.0 to before 10.0.22621.475110.0.22621.4751Patch availableCNA
MicrosoftWindows 11 version 22H310.0.22631.0 to before 10.0.22631.475110.0.22631.4751Patch availableCNA
MicrosoftWindows 11 Version 23H210.0.22631.0 to before 10.0.22631.475110.0.22631.4751Patch availableCNA
MicrosoftWindows 11 Version 24H210.0.26100.0 to before 10.0.26100.289410.0.26100.2894Patch availableCNA
MicrosoftWindows Server 2008 R2 Service Pack 16.1.7601.0 to before 6.1.7601.275206.1.7601.27520Patch availableCNA
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.0 to before 6.1.7601.275206.1.7601.27520Patch availableCNA
MicrosoftWindows Server 2008 Service Pack 26.0.6003.0 to before 6.0.6003.230706.0.6003.23070Patch availableCNA
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.0 to before 6.0.6003.230706.0.6003.23070Patch availableCNA
MicrosoftWindows Server 20126.2.9200.0 to before 6.2.9200.252736.2.9200.25273Patch availableCNA
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0 to before 6.2.9200.252736.2.9200.25273Patch availableCNA
MicrosoftWindows Server 2012 R26.3.9600.0 to before 6.3.9600.223716.3.9600.22371Patch availableCNA
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0 to before 6.3.9600.223716.3.9600.22371Patch availableCNA
MicrosoftWindows Server 201610.0.14393.0 to before 10.0.14393.769910.0.14393.7699Patch availableCNA
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 to before 10.0.14393.769910.0.14393.7699Patch availableCNA
MicrosoftWindows Server 201910.0.17763.0 to before 10.0.17763.677510.0.17763.6775Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to before 10.0.17763.677510.0.17763.6775Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.309110.0.20348.3091Patch availableCNA
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 to before 10.0.25398.136910.0.25398.1369Patch availableCNA
MicrosoftWindows Server 202510.0.26100.0 to before 10.0.26100.289410.0.26100.2894Patch availableCNA
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to before 10.0.26100.289410.0.26100.2894Patch availableCNA
  • Windows 10 Version 1507 VendorMicrosoft Affected 10.0.10240.0 to before 10.0.10240.20890 Fixed in 10.0.10240.20890 Patch available CNA
  • Windows 10 Version 1607 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.7699 Fixed in 10.0.14393.7699 Patch available CNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.6775 Fixed in 10.0.17763.6775 Patch available CNA
  • Windows 10 Version 21H2 VendorMicrosoft Affected 10.0.19044.0 to before 10.0.19044.5371 Fixed in 10.0.19044.5371 Patch available CNA
  • Windows 10 Version 22H2 VendorMicrosoft Affected 10.0.19045.0 to before 10.0.19045.5371 Fixed in 10.0.19045.5371 Patch available CNA
  • Windows 11 version 22H2 VendorMicrosoft Affected 10.0.22621.0 to before 10.0.22621.4751 Fixed in 10.0.22621.4751 Patch available CNA
  • Windows 11 version 22H3 VendorMicrosoft Affected 10.0.22631.0 to before 10.0.22631.4751 Fixed in 10.0.22631.4751 Patch available CNA
  • Windows 11 Version 23H2 VendorMicrosoft Affected 10.0.22631.0 to before 10.0.22631.4751 Fixed in 10.0.22631.4751 Patch available CNA
  • Windows 11 Version 24H2 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.2894 Fixed in 10.0.26100.2894 Patch available CNA
  • Windows Server 2008 R2 Service Pack 1 VendorMicrosoft Affected 6.1.7601.0 to before 6.1.7601.27520 Fixed in 6.1.7601.27520 Patch available CNA
  • Windows Server 2008 R2 Service Pack 1 (Server Core installation) VendorMicrosoft Affected 6.1.7601.0 to before 6.1.7601.27520 Fixed in 6.1.7601.27520 Patch available CNA
  • Windows Server 2008 Service Pack 2 VendorMicrosoft Affected 6.0.6003.0 to before 6.0.6003.23070 Fixed in 6.0.6003.23070 Patch available CNA
  • Windows Server 2008 Service Pack 2 (Server Core installation) VendorMicrosoft Affected 6.0.6003.0 to before 6.0.6003.23070 Fixed in 6.0.6003.23070 Patch available CNA
  • Windows Server 2012 VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.25273 Fixed in 6.2.9200.25273 Patch available CNA
  • Windows Server 2012 (Server Core installation) VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.25273 Fixed in 6.2.9200.25273 Patch available CNA
  • Windows Server 2012 R2 VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.22371 Fixed in 6.3.9600.22371 Patch available CNA
  • Windows Server 2012 R2 (Server Core installation) VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.22371 Fixed in 6.3.9600.22371 Patch available CNA
  • Windows Server 2016 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.7699 Fixed in 10.0.14393.7699 Patch available CNA
  • Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.7699 Fixed in 10.0.14393.7699 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.6775 Fixed in 10.0.17763.6775 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.6775 Fixed in 10.0.17763.6775 Patch available CNA
  • Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.3091 Fixed in 10.0.20348.3091 Patch available CNA
  • Windows Server 2022, 23H2 Edition (Server Core installation) VendorMicrosoft Affected 10.0.25398.0 to before 10.0.25398.1369 Fixed in 10.0.25398.1369 Patch available CNA
  • Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.2894 Fixed in 10.0.26100.2894 Patch available CNA
  • Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.2894 Fixed in 10.0.26100.2894 Patch available CNA

CPE configurations NVD · 20

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*before 10.0.10240.20890VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*before 10.0.10240.20890VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*before 10.0.14393.7699VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*before 10.0.14393.7699VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*before 10.0.17763.6775VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*before 10.0.17763.6775VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*before 10.0.19044.5371VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*before 10.0.19045.5371VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*before 10.0.22621.4751VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*before 10.0.22631.4751VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:* Versions before 10.0.10240.20890 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:* Versions before 10.0.10240.20890 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* Versions before 10.0.14393.7699 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* Versions before 10.0.14393.7699 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* Versions before 10.0.17763.6775 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* Versions before 10.0.17763.6775 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* Versions before 10.0.19044.5371 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* Versions before 10.0.19045.5371 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:* Versions before 10.0.22621.4751 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* Versions before 10.0.22631.4751 Vulnerable ·Microsoft
Show 10 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*before 10.0.26100.2894VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*r2 sp1VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*r2VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*before 10.0.14393.7699VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*before 10.0.17763.6775VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*before 10.0.20348.3091VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*before 10.0.25398.1369VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*before 10.0.26100.2894VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* Versions before 10.0.26100.2894 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* Versions r2 sp1 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* Versions before 10.0.14393.7699 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* Versions before 10.0.17763.6775 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions before 10.0.20348.3091 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* Versions before 10.0.25398.1369 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* Versions before 10.0.26100.2894 Vulnerable ·Microsoft

Remediation

Microsoft 14 updates

  • KB5050063
    Monthly Rollup
    • Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.23070
    • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.23070
    • Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.23070
    • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.23070
  • KB5050061
    Security Only
    • Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.23070
    • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.23070
    • Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.23070
    • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.23070
  • KB5050049
    Monthly Rollup
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.27520
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.27520
Show 11 more Microsoft updates
  • KB5050048
    Monthly Rollup
    • Windows Server 2012 R2 6.3.9600.22371
    • Windows Server 2012 R2 (Server Core installation) 6.3.9600.22371
  • KB5050021
    Security Update
    • Windows 11 Version 22H2 for ARM64-based Systems 10.0.22621.4751
    • Windows 11 Version 22H2 for x64-based Systems 10.0.22621.4751
    • Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.4751
    • Windows 11 Version 23H2 for x64-based Systems 10.0.22631.4751
  • KB5050013
    Security Update
    • Microsoft .NET Framework 4.6/4.6.2 10.0.10240.20890
    • Windows 10 for 32-bit Systems 10.0.10240.20890
    • Windows 10 for x64-based Systems 10.0.10240.20890
  • KB5050009
    Security Update
    • Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.2894
    • Windows 11 Version 24H2 for x64-based Systems 10.0.26100.2894
    • Windows Server 2025 10.0.26100.2894
    • Windows Server 2025 (Server Core installation) 10.0.26100.2894
  • KB5050008
    Security Update
    • Windows 10 Version 1809 for 32-bit Systems 10.0.17763.6775
    • Windows 10 Version 1809 for x64-based Systems 10.0.17763.6775
    • Windows Server 2019 10.0.17763.6775
    • Windows Server 2019 (Server Core installation) 10.0.17763.6775
  • KB5050006
    Security Only
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.27520
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.27520
  • KB5050004
    Monthly Rollup
    • Windows Server 2012 6.2.9200.25273
    • Windows Server 2012 (Server Core installation) 6.2.9200.25273
  • KB5049993
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 10.0.14393.7699
    • Microsoft .NET Framework 3.5 AND 4.7.2 10.0.14393.7699
    • Windows 10 Version 1607 for 32-bit Systems 10.0.14393.7699
    • Windows 10 Version 1607 for x64-based Systems 10.0.14393.7699
    • Windows Server 2016 10.0.14393.7699
    • Windows Server 2016 (Server Core installation) 10.0.14393.7699
  • KB5049984
    Security Update
    • Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1369
  • KB5049983
    Security Update
    • Windows Server 2022 10.0.20348.3091
    • Windows Server 2022 (Server Core installation) 10.0.20348.3091
  • KB5049981
    Security Update
    • Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.5371
    • Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.5371
    • Windows 10 Version 21H2 for x64-based Systems 10.0.19044.5371
    • Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.5371
    • Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.5371
    • Windows 10 Version 22H2 for x64-based Systems 10.0.19045.5371

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-21339
  2. 2026-10-03 Alias added: GHSA-2p5v-755j-54f5

References

Patch 1

  • TI-2017-06077 Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-24062 Windows SMB Client Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2025-24042 Internet Shortcut Files Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-32708 Windows Task Scheduler Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-29106 Windows MSHTML Platform Spoofing Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-19802 Windows MSHTML Platform Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
See all 1229 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences