CVE-2025-21241Windows Telephony Service Remote Code Execution Vulnerability
- 8.8HighCVSS base score
- 1.5%Exploitation in 30 daysEPSS · top 25% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Windows Telephony Service Remote Code Execution Vulnerability
Timeline
ID reserved
By microsoft
- 35 days later
· 35 days later
Published
- 17 months later
· 17 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| NVDNVD · Analyzed | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.5% · top 25% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
Microsoft · Windows 10 Version 1507
- affected 10.0.10240.0 – < 10.0.10240.20890
Microsoft · Windows 10 Version 1607
- affected 10.0.14393.0 – < 10.0.14393.7699
Microsoft · Windows 10 Version 1809
- affected 10.0.17763.0 – < 10.0.17763.6775
Microsoft · Windows 10 Version 21H2
- affected 10.0.19044.0 – < 10.0.19044.5371
Microsoft · Windows 10 Version 22H2
- affected 10.0.19045.0 – < 10.0.19045.5371
Microsoft · Windows 11 version 22H2
- affected 10.0.22621.0 – < 10.0.22621.4751
Microsoft · Windows 11 version 22H3
- affected 10.0.22631.0 – < 10.0.22631.4751
Microsoft · Windows 11 Version 23H2
- affected 10.0.22631.0 – < 10.0.22631.4751
Microsoft · Windows 11 Version 24H2
- affected 10.0.26100.0 – < 10.0.26100.2894
Microsoft · Windows Server 2016
- affected 10.0.14393.0 – < 10.0.14393.7699
Microsoft · Windows Server 2016 (Server Core installation)
- affected 10.0.14393.0 – < 10.0.14393.7699
Microsoft · Windows Server 2019
- affected 10.0.17763.0 – < 10.0.17763.6775
Microsoft · Windows Server 2019 (Server Core installation)
- affected 10.0.17763.0 – < 10.0.17763.6775
Microsoft · Windows Server 2022
- affected 10.0.20348.0 – < 10.0.20348.3091
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)
- affected 10.0.25398.0 – < 10.0.25398.1369
Microsoft · Windows Server 2025
- affected 10.0.26100.0 – < 10.0.26100.2894
Microsoft · Windows Server 2025 (Server Core installation)
- affected 10.0.26100.0 – < 10.0.26100.2894
References
References1
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-2308 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-21241)Record last updated .