CVE-2025-21339: 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-2025-21339) is a heap-based buffer overflow in the Windows Telephony Service component of Microsoft Windows 10 Version 1507 (build 10.0.10240.0). It enables remote attackers to execute arbitrary code on affected systems, potentially leading to full system compromise. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity with network attack vector, low attack complexity, no privileges required, and user interaction required. Microsoft has published an official fix for this issue.
Potential Impact
Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code on vulnerable Windows 10 Version 1507 systems, resulting in full compromise of confidentiality, integrity, and availability of the affected system. This could lead to system takeover or disruption of services.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21339 to remediate this vulnerability.
CVE-2025-21339: 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-2025-21339) is a heap-based buffer overflow in the Windows Telephony Service component of Microsoft Windows 10 Version 1507 (build 10.0.10240.0). It enables remote attackers to execute arbitrary code on affected systems, potentially leading to full system compromise. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity with network attack vector, low attack complexity, no privileges required, and user interaction required. Microsoft has published an official fix for this issue.
Potential Impact
Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code on vulnerable Windows 10 Version 1507 systems, resulting in full compromise of confidentiality, integrity, and availability of the affected system. This could lead to system takeover or disruption of services.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21339 to remediate this vulnerability.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-11T00:29:48.352Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21339","vendor":"Microsoft"}]
Threat ID: 68c0bd529ed239a66badebee
Added to database: 09/09/2025, 23:50:42 UTC
Last enriched: 06/10/2026, 09:56:51 UTC
Last updated: 07/08/2026, 10:28:16 UTC
Views: 191
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