Executive brief
A security vulnerability exists in the Microsoft Windows DNS component, which is responsible for translating human-readable web addresses into computer-readable IP addresses. An attacker who already has basic access to a system could exploit this flaw to bypass built-in security protections. While this does not allow for direct data theft or system crashes, it could be used as a stepping stone to perform unauthorized actions or weaken the system's overall security posture.
Technical details
A privilege management vulnerability (CWE-269) exists in the Microsoft Windows DNS component. The flaw allows a locally authenticated attacker with low privileges to bypass security feature restrictions. The attack vector is local, requiring the attacker to have existing execution capabilities on the target host. According to the CVSS metrics, the primary impact is on integrity (High), while confidentiality and availability are not directly affected. Microsoft has released security updates to address this issue across affected versions of Windows 11 and Windows Server 2025.
Affected products
- 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 10.0.26200.0 to 10.0.28000.2269
- Microsoft Windows Server 2025 10.0.26100.0 to 10.0.26100.33158
Timeline
- 2026-07-14: disclosed: Initial publication by Microsoft and NVD
- 2026-07-14: patched: Security updates made available by Microsoft