CVE-2026-40404: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
AI Analysis
Technical Summary
This vulnerability (CVE-2026-40404) involves a heap-based buffer overflow in the Windows Universal Disk Format File System Driver on Windows 10 Version 1607 (build 10.0.14393.0). The flaw allows an attacker with limited privileges to elevate their privileges by exploiting improper memory handling in the UDFS driver. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity with 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 elevate their privileges to a higher level, potentially gaining full control over the affected system. The impact includes complete compromise of confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40404. Applying this patch will remediate the vulnerability.
CVE-2026-40404: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Windows Universal Disk Format File System Driver (UDFS) 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-2026-40404) involves a heap-based buffer overflow in the Windows Universal Disk Format File System Driver on Windows 10 Version 1607 (build 10.0.14393.0). The flaw allows an attacker with limited privileges to elevate their privileges by exploiting improper memory handling in the UDFS driver. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity with 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 elevate their privileges to a higher level, potentially gaining full control over the affected system. The impact includes complete compromise of confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40404. Applying this patch will remediate the 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-2026-40404","vendor":"Microsoft"}]
Threat ID: 6a284cbb8dd33fbd8566452a
Added to database: 06/09/2026, 17:26:19 UTC
Last enriched: 07/29/2026, 21:45:31 UTC
Last updated: 07/31/2026, 21:26:44 UTC
Views: 70
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