CVE-2025-21417
HIGHCVSS 8.8/10EPSS 1.13%
Last modified
CVE-2025-21417 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Windows Telephony Service Remote Code Execution Vulnerability. EPSS estimates a 1.13% chance of exploitation in the next 30 days.
Description
Windows Telephony Service Remote Code Execution Vulnerability
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | Windows 10 1507 | < 10.0.10240.20890 | — |
| Microsoft | Windows 10 1607 | < 10.0.14393.7699 | — |
| Microsoft | Windows 10 1809 | < 10.0.17763.6775 | — |
| Microsoft | Windows 10 21h2 | < 10.0.19044.5371 | — |
| Microsoft | Windows 10 22h2 | < 10.0.19045.5371 | — |
| Microsoft | Windows 11 22h2 | < 10.0.22621.4751 | — |
| Microsoft | Windows 11 23h2 | < 10.0.22621.4751 | — |
| Microsoft | Windows 11 23h2 | < 10.0.22631.4751 | — |
| Microsoft | Windows 11 24h2 | < 10.0.26100.2894 | — |
| Microsoft | Windows Server 2008 | All versions | Sp2 |
| Microsoft | Windows Server 2008 | r2 | Sp1 |
| Microsoft | Windows Server 2012 | All versions | — |
| Microsoft | Windows Server 2012 | r2 | — |
| Microsoft | Windows Server 2016 | < 10.0.14393.7699 | — |
| Microsoft | Windows Server 2019 | < 10.0.17763.6775 | — |
| Microsoft | Windows Server 2022 | < 10.0.20348.3091 | — |
| Microsoft | Windows Server 2022 23h2 | < 10.0.25398.1369 | — |
| Microsoft | Windows Server 2025 | < 10.0.26100.2894 | — |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21417Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-21417?
Windows Telephony Service Remote Code Execution Vulnerability
How severe is CVE-2025-21417?
CVE-2025-21417 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.13% probability of exploitation in the next 30 days.
How do I fix CVE-2025-21417?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-21410Windows Routing and Remote Access Service (RRAS) Remote Code…8.8
- CVE-2025-21411Windows Telephony Service Remote Code Execution Vulnerabilit…8.8
- CVE-2025-21413Windows Telephony Service Remote Code Execution Vulnerabilit…8.8
- CVE-2025-21414Windows Core Messaging Elevation of Privileges Vulnerability7
- CVE-2025-21415Authentication bypass by spoofing in Azure AI Face Service a…8.8
- CVE-2025-21416Missing authorization in Azure Virtual Desktop allows an aut…8.8
- CVE-2025-21418Windows Ancillary Function Driver for WinSock Elevation of P…7.8
- CVE-2025-21419Windows Setup Files Cleanup Elevation of Privilege Vulnerabi…7.1
- CVE-2025-21420Windows Disk Cleanup Tool Elevation of Privilege Vulnerabili…7.8
- CVE-2025-21421Memory corruption while processing escape code in API.7.8
- CVE-2025-21422Cryptographic issue while processing crypto API calls, missi…7.8
- CVE-2025-21423Memory corruption occurs when handling client calls to Enabl…7.8
Are you affected by CVE-2025-21417?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST