CVE-2025-21246: 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-2025-21246) involves 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 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 released an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow remote code execution, leading to full compromise of affected systems. The attacker could gain control over the system, potentially leading to data disclosure, modification, or denial of service.
Mitigation Recommendations
An official patch is available from Microsoft to fix this vulnerability. Users and administrators should apply the update provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21246 to remediate this issue.
CVE-2025-21246: 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-2025-21246) involves 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 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 released an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow remote code execution, leading to full compromise of affected systems. The attacker could gain control over the system, potentially leading to data disclosure, modification, or denial of service.
Mitigation Recommendations
An official patch is available from Microsoft to fix this vulnerability. Users and administrators should apply the update provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21246 to remediate this issue.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-10T23:54:12.926Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21246","vendor":"Microsoft"}]
Threat ID: 68c0c0d09ed239a66badfcf8
Added to database: 09/10/2025, 00:05:36 UTC
Last enriched: 06/10/2026, 09:45:56 UTC
Last updated: 07/07/2026, 10:33:19 UTC
Views: 232
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