CVE-2025-21238: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1507
Windows Telephony Service Remote Code Execution Vulnerability
AI Analysis
Technical Summary
This vulnerability (CVE-2025-21238) involves a heap-based buffer overflow in the Windows Telephony Service on Windows 10 Version 1507. It enables remote attackers to execute arbitrary code on affected systems without privileges and with low attack complexity, requiring user interaction. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code on vulnerable Windows 10 Version 1507 systems, potentially leading to full system compromise including unauthorized access, data modification, and denial of service.
Mitigation Recommendations
An official security update from Microsoft is available to fix this vulnerability. Users and administrators should apply the provided patch promptly to mitigate the risk. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21238 for detailed update instructions.
CVE-2025-21238: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1507
Description
Windows Telephony Service Remote Code Execution Vulnerability
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2025-21238) involves a heap-based buffer overflow in the Windows Telephony Service on Windows 10 Version 1507. It enables remote attackers to execute arbitrary code on affected systems without privileges and with low attack complexity, requiring user interaction. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code on vulnerable Windows 10 Version 1507 systems, potentially leading to full system compromise including unauthorized access, data modification, and denial of service.
Mitigation Recommendations
An official security update from Microsoft is available to fix this vulnerability. Users and administrators should apply the provided patch promptly to mitigate the risk. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21238 for detailed update instructions.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-10T23:54:12.923Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21238","vendor":"Microsoft"}]
Threat ID: 68c0c0d09ed239a66badfcef
Added to database: 09/10/2025, 00:05:36 UTC
Last enriched: 06/10/2026, 09:45:05 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 221
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