Executive brief
A security vulnerability has been identified in the Windows component responsible for reading Universal Disk Format (UDF) files, commonly used for optical media like DVDs. An attacker with basic access to a computer could exploit this flaw to gain full administrative control over the system. This could lead to unauthorized access to sensitive data, the installation of malicious software, or a complete system takeover.
Technical details
This vulnerability is classified as an Elevation of Privilege (EoP) within the Windows Universal Disk Format File System Driver (UDFS). The root cause involves a heap-based buffer overflow (CWE-122) and an integer underflow (CWE-191) during the processing of UDF files. An attacker requires local access to the system and must convince a user to interact with a specially crafted file or disk image. Successful exploitation allows the attacker to execute code with elevated privileges, potentially gaining full SYSTEM access. Microsoft has released security updates to address this issue across affected Windows and Windows Server versions.
Affected products
- Microsoft Windows 10 Version 1607 10.0.14393.0 to 10.0.14393.9339
- Microsoft Windows 10 Version 1809 10.0.17763.0 to 10.0.17763.9020
- Microsoft Windows 10 Version 21H2 10.0.19044.0 to 10.0.19044.7548
- Microsoft Windows 10 Version 22H2 10.0.19045.0 to 10.0.19045.7548
- Microsoft Windows 11 Version 24H2 10.0.26100.0 to 10.0.26100.8875
- Microsoft Windows 11 Version 25H2 10.0.26200.0 to 10.0.26200.8875
- Microsoft Windows 11 version 26H1 10.0.28000.0 to 10.0.28000.2525
- Microsoft Windows Server 2012 6.2.9200.0 to 6.2.9200.26226
Timeline
- 2026-07-14: disclosed
- 2026-07-14: advisory