CVE-2025-21295: CWE-416: Use After Free in Microsoft Windows 10 Version 1507
SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability
AI Analysis
Technical Summary
CVE-2025-21295 is a use-after-free vulnerability (CWE-416) affecting the SPNEGO Extended Negotiation (NEGOEX) security mechanism in Microsoft Windows 10 Version 1507 (build 10.0.10240.0). The flaw could be exploited remotely to execute arbitrary code with high impact on confidentiality, integrity, and availability. The vulnerability has a CVSS v3.1 base score of 8.1, indicating high severity. Microsoft has released an official fix to address this issue as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthenticated remote attacker to execute arbitrary code on the affected system, potentially leading to full system compromise including complete loss of confidentiality, integrity, and availability.
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. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21295 for detailed patch information and deployment instructions.
CVE-2025-21295: CWE-416: Use After Free in Microsoft Windows 10 Version 1507
Description
SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-21295 is a use-after-free vulnerability (CWE-416) affecting the SPNEGO Extended Negotiation (NEGOEX) security mechanism in Microsoft Windows 10 Version 1507 (build 10.0.10240.0). The flaw could be exploited remotely to execute arbitrary code with high impact on confidentiality, integrity, and availability. The vulnerability has a CVSS v3.1 base score of 8.1, indicating high severity. Microsoft has released an official fix to address this issue as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthenticated remote attacker to execute arbitrary code on the affected system, potentially leading to full system compromise including complete loss of confidentiality, integrity, and availability.
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. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21295 for detailed patch information and deployment instructions.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-10T23:54:12.948Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21295","vendor":"Microsoft"}]
Threat ID: 68c0bd509ed239a66badeb67
Added to database: 09/09/2025, 23:50:40 UTC
Last enriched: 06/10/2026, 09:50:49 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 103
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