CVE-2026-49790: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 10 Version 1607
Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
AI Analysis
Technical Summary
This vulnerability involves an integer underflow (wrap or wraparound) in the Windows Universal Disk Format File System Driver (UDFS) on Windows 10 Version 1607 (build 10.0.14393.0). The flaw could be exploited to elevate privileges, allowing an attacker with limited user rights to gain higher privileges on the affected system. The CVSS v3.1 score is 7.3, indicating high severity, with impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation could allow an attacker with limited privileges to elevate their privileges, 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
Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
CVSS v3.1
Score 7.3high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer underflow (wrap or wraparound) in the Windows Universal Disk Format File System Driver (UDFS) on Windows 10 Version 1607 (build 10.0.14393.0). The flaw could be exploited to elevate privileges, allowing an attacker with limited user rights to gain higher privileges on the affected system. The CVSS v3.1 score is 7.3, indicating high severity, with impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation could allow an attacker with limited privileges to elevate their privileges, 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: 08/13/2026, 14:23:38 UTC
Last updated: 08/25/2026, 22:52:12 UTC
Views: 88
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