Improper access control in Microsoft Windows and Windows Server - CVE-2025-33056

Vulnerability identifier: #VU110730

CSH Severity: High

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-33056

CWE-ID: CWE-284

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in Windows Local Security Authority (LSA). A remote attacker can bypass implemented security restrictions and perform a denial of service (DoS) attack.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.5965, 10 22H2 10.0.19045.5965, 10 1507 10.0.10240.21034, 10 1607 10.0.14393.8148, 10 1809 10.0.17763.7434, 11 22H2 10.0.22621.5472, 11 23H2 10.0.22631.5472, 11 24H2 10.0.26100.4270, 11 24H2 10.0.26100.4349
Windows Server - addressed in versions 2008 R2 6.1.7601.27769, 2008 6.0.6003.23351, 2012 R2 6.3.9600.22620, 2012 6.2.9200.25522, 2016 10.0.14393.8148, 2019 10.0.17763.7434, 2022 23H2 10.0.25398.1665, 2022 10.0.20348.3745, 2022 10.0.20348.3807, 2025 10.0.26100.4270, 2025 10.0.26100.4349

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-33056

• Multiple vulnerabilities in Microsoft Windows Local Security Authority (LSA)