CVE-2026-49790: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 10 Version 1607
CVE-2026-49790 is a high-severity elevation of privilege vulnerability in the Windows Universal Disk Format File System Driver (UDFS) affecting Windows 10 Version 1607 (build 10.0.14393.0). The issue is caused by an integer underflow (wrap or wraparound) condition. This vulnerability could allow an attacker with limited privileges to elevate their privileges on the affected system. An official fix is available from Microsoft.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-49790) involves an integer underflow in the Windows Universal Disk Format File System Driver (UDFS) in Windows 10 Version 1607 (build 10.0.14393.0). The integer underflow can lead to elevation of privilege, allowing an attacker with local access and limited privileges to gain higher privileges. The CVSS 3.1 base score is 7.3, reflecting high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with local access and limited privileges to elevate their privileges to higher levels, potentially gaining full control over the affected system. The vulnerability impacts 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 in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49790 to remediate this vulnerability.
CVE-2026-49790: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 10 Version 1607
Description
CVE-2026-49790 is a high-severity elevation of privilege vulnerability in the Windows Universal Disk Format File System Driver (UDFS) affecting Windows 10 Version 1607 (build 10.0.14393.0). The issue is caused by an integer underflow (wrap or wraparound) condition. This vulnerability could allow an attacker with limited privileges to elevate their privileges on the affected system. An official fix is available from Microsoft.
CVSS v3.1
Score 7.3high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-49790) involves an integer underflow in the Windows Universal Disk Format File System Driver (UDFS) in Windows 10 Version 1607 (build 10.0.14393.0). The integer underflow can lead to elevation of privilege, allowing an attacker with local access and limited privileges to gain higher privileges. The CVSS 3.1 base score is 7.3, reflecting high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with local access and limited privileges to elevate their privileges to higher levels, potentially gaining full control over the affected system. The vulnerability impacts 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 in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49790 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-01T17:02:37.207Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49790","vendor":"Microsoft"}]
Threat ID: 6a566f6d68715ace43e6b542
Added to database: 07/14/2026, 17:18:37 UTC
Last enriched: 07/15/2026, 01:47:41 UTC
Last updated: 07/15/2026, 01:47:41 UTC
Views: 2
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