CVE-2025-21236: 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-2025-21236) involves a heap-based buffer overflow in the Windows Telephony Service on Windows 10 Version 1507 (build 10.0.10240.0). The flaw allows an unauthenticated attacker to remotely execute code with high impact on confidentiality, integrity, and availability. The CVSS 3.1 base score is 8.8, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and complete impact on system security. Microsoft has published an official fix to address this vulnerability.
Potential Impact
Successful exploitation of this heap-based buffer overflow could allow an attacker to execute arbitrary code remotely, potentially leading to full system compromise including complete loss of confidentiality, integrity, and availability on affected Windows 10 Version 1507 systems.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21236 to remediate this vulnerability.
CVE-2025-21236: 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-2025-21236) involves a heap-based buffer overflow in the Windows Telephony Service on Windows 10 Version 1507 (build 10.0.10240.0). The flaw allows an unauthenticated attacker to remotely execute code with high impact on confidentiality, integrity, and availability. The CVSS 3.1 base score is 8.8, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and complete impact on system security. Microsoft has published an official fix to address this vulnerability.
Potential Impact
Successful exploitation of this heap-based buffer overflow could allow an attacker to execute arbitrary code remotely, potentially leading to full system compromise including complete loss of confidentiality, integrity, and availability on affected Windows 10 Version 1507 systems.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21236 to remediate this vulnerability.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-10T23:54:12.922Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21236","vendor":"Microsoft"}]
Threat ID: 68c0bd4e9ed239a66badeaab
Added to database: 09/09/2025, 23:50:38 UTC
Last enriched: 06/10/2026, 09:44:50 UTC
Last updated: 09/10/2026, 19:24:55 UTC
Views: 115
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