CVE-2025-55334: 
vulnerability analysis and mitigation

CVE-2025-55334 is a security vulnerability discovered in the Windows Kernel that involves cleartext storage of sensitive information. The vulnerability was initially disclosed on October 14, 2025, and affects multiple versions of Windows 11, including 22H2, 23H2, 24H2, and 25H2 (NVD).

The vulnerability is classified under CWE-312 (Cleartext Storage of Sensitive Information). It has received a CVSS v3.1 base score of 5.5 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N, indicating local access requirements with low attack complexity and privilege requirements. Microsoft's assessment differs slightly with a CVSS score of 6.2 (Medium) and vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N (NVD).

The vulnerability allows an unauthorized attacker to bypass security features locally, potentially exposing sensitive information stored in cleartext within the Windows Kernel. The impact is primarily focused on confidentiality (High), while integrity and availability are not affected (NVD).

Microsoft has addressed this vulnerability through security updates for affected Windows 11 versions. The fix is available for Windows 11 22H2 (versions up to 10.0.22621.6060), Windows 11 23H2 (versions up to 10.0.22631.6060), Windows 11 24H2 (versions up to 10.0.26100.6899), and Windows 11 25H2 (versions up to 10.0.26200.6899) (NVD).