CVE-2026-40415: CWE-416: Use After Free in Microsoft Windows 10 Version 1809
Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-40415) involves a use-after-free condition in the TCP/IP implementation of Microsoft Windows 10 Version 1809 (build 10.0.17763.0). Exploitation could allow an attacker to execute arbitrary code remotely without user interaction, given network access. The vulnerability has been assigned a high CVSS v3.1 score of 8.1, reflecting its potential impact on confidentiality, integrity, and availability. Microsoft has released an official patch to remediate this issue, as documented in their security update guide.
Potential Impact
Successful exploitation of this use-after-free vulnerability could result in remote code execution with no privileges required and no user interaction needed. This could lead to full compromise of the affected system, impacting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40415 to remediate this vulnerability.
CVE-2026-40415: CWE-416: Use After Free in Microsoft Windows 10 Version 1809
Description
Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-40415) involves a use-after-free condition in the TCP/IP implementation of Microsoft Windows 10 Version 1809 (build 10.0.17763.0). Exploitation could allow an attacker to execute arbitrary code remotely without user interaction, given network access. The vulnerability has been assigned a high CVSS v3.1 score of 8.1, reflecting its potential impact on confidentiality, integrity, and availability. Microsoft has released an official patch to remediate this issue, as documented in their security update guide.
Potential Impact
Successful exploitation of this use-after-free vulnerability could result in remote code execution with no privileges required and no user interaction needed. This could lead to full compromise of the affected system, impacting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40415 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-2026-40415","vendor":"Microsoft"}]
Threat ID: 6a036557cbff5d861008c9d0
Added to database: 05/12/2026, 17:37:27 UTC
Last enriched: 06/19/2026, 17:40:06 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 101
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