CVE-2025-21378: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1507
Windows CSC Service Elevation of Privilege Vulnerability
AI Analysis
Technical Summary
This vulnerability (CVE-2025-21378) involves a heap-based buffer overflow in the Windows CSC Service on Windows 10 Version 1507 (build 10.0.10240.0). It allows an attacker with local access and low privileges to elevate their privileges without requiring user interaction. The vulnerability is classified under CWE-122 (Heap-based Buffer Overflow) and has a CVSS v3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with limited privileges to gain elevated privileges on the affected system, potentially leading to full system compromise. The impact includes complete confidentiality, integrity, and availability loss on the vulnerable system. There are no known exploits in the wild at the time of publication.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1507 (build 10.0.10240.0) as soon as possible to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21378 for detailed update instructions.
CVE-2025-21378: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1507
Description
Windows CSC Service Elevation of Privilege Vulnerability
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2025-21378) involves a heap-based buffer overflow in the Windows CSC Service on Windows 10 Version 1507 (build 10.0.10240.0). It allows an attacker with local access and low privileges to elevate their privileges without requiring user interaction. The vulnerability is classified under CWE-122 (Heap-based Buffer Overflow) and has a CVSS v3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with limited privileges to gain elevated privileges on the affected system, potentially leading to full system compromise. The impact includes complete confidentiality, integrity, and availability loss on the vulnerable system. There are no known exploits in the wild at the time of publication.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1507 (build 10.0.10240.0) as soon as possible to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21378 for detailed update instructions.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-11T00:29:48.363Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21378","vendor":"Microsoft"}]
Threat ID: 68c0bd539ed239a66badec47
Added to database: 09/09/2025, 23:50:43 UTC
Last enriched: 06/10/2026, 09:59:38 UTC
Last updated: 07/08/2026, 10:28:16 UTC
Views: 211
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