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 Windows TCP/IP implementation on Windows 10 Version 1809. Exploitation could allow remote code execution by an attacker over the network. The vulnerability has a CVSS 3.1 base score of 8.1, indicating high severity with network attack vector, high impact on confidentiality, integrity, and availability, and requires no privileges or user interaction. Microsoft has issued an official patch to address this issue.
Potential Impact
Successful exploitation of this vulnerability could enable an attacker to execute arbitrary code remotely on affected systems, potentially leading to full system compromise. The impact includes complete loss of confidentiality, integrity, and availability of the affected system. No known active exploits have been reported.
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-2026-40415 as soon as possible 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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-40415) involves a use-after-free condition in the Windows TCP/IP implementation on Windows 10 Version 1809. Exploitation could allow remote code execution by an attacker over the network. The vulnerability has a CVSS 3.1 base score of 8.1, indicating high severity with network attack vector, high impact on confidentiality, integrity, and availability, and requires no privileges or user interaction. Microsoft has issued an official patch to address this issue.
Potential Impact
Successful exploitation of this vulnerability could enable an attacker to execute arbitrary code remotely on affected systems, potentially leading to full system compromise. The impact includes complete loss of confidentiality, integrity, and availability of the affected system. No known active exploits have been reported.
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-2026-40415 as soon as possible 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: 5/12/2026, 5:37:27 PM
Last enriched: 5/12/2026, 6:23:01 PM
Last updated: 5/13/2026, 4:51:24 AM
Views: 2
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