CVE-2026-40414: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607
Windows TCP/IP Denial of Service Vulnerability
AI Analysis
Technical Summary
CVE-2026-40414 is a vulnerability classified as CWE-476 (NULL Pointer Dereference) affecting the TCP/IP implementation in Microsoft Windows 10 Version 1607 (build 10.0.14393.0). The flaw allows an attacker to cause a denial of service by triggering a NULL pointer dereference, resulting in system instability or crash. The vulnerability has a CVSS 3.1 base score of 7.4, indicating high severity, with attack vector requiring adjacent network access, no privileges, and no user interaction. Microsoft has released an official fix to remediate this issue.
Potential Impact
The vulnerability can cause a denial of service condition on affected Windows 10 Version 1607 systems by crashing or destabilizing the TCP/IP stack due to a NULL pointer dereference. There is no impact on confidentiality or integrity. No known exploits are reported in the wild at this time.
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-2026-40414 to remediate this vulnerability.
CVE-2026-40414: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607
Description
Windows TCP/IP Denial of Service Vulnerability
CVSS v3.1
Score 7.4high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-40414 is a vulnerability classified as CWE-476 (NULL Pointer Dereference) affecting the TCP/IP implementation in Microsoft Windows 10 Version 1607 (build 10.0.14393.0). The flaw allows an attacker to cause a denial of service by triggering a NULL pointer dereference, resulting in system instability or crash. The vulnerability has a CVSS 3.1 base score of 7.4, indicating high severity, with attack vector requiring adjacent network access, no privileges, and no user interaction. Microsoft has released an official fix to remediate this issue.
Potential Impact
The vulnerability can cause a denial of service condition on affected Windows 10 Version 1607 systems by crashing or destabilizing the TCP/IP stack due to a NULL pointer dereference. There is no impact on confidentiality or integrity. No known exploits are reported in the wild at this time.
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-2026-40414 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-13T00:27:50.798Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40414","vendor":"Microsoft"}]
Threat ID: 6a036557cbff5d861008c9cd
Added to database: 05/12/2026, 17:37:27 UTC
Last enriched: 06/19/2026, 17:40:00 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 66
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