CVE-2026-0386
Published: 13 January 2026
Summary
CVE-2026-0386 is a high-severity Improper Access Control (CWE-284) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation of Remote Services (T1210); ranked at the 15.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2026-0386 is an improper access control vulnerability in Windows Deployment Services. Published on 2026-01-13T18:16:06.440, it carries a CVSS v3.1 base score of 7.5 (AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H) and maps to CWE-284. The issue enables an unauthorized attacker to execute code over an adjacent network due to flawed access controls in the affected component.
Attackers on an adjacent network can exploit this vulnerability without requiring user privileges or interaction, though exploitation demands high complexity. No authentication is needed, and successful attacks allow arbitrary code execution, leading to high impacts on confidentiality, integrity, and availability within the unchanged scope.
Microsoft provides detailed guidance on patches and mitigations in its update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-0386.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-2206
Vulnerability details
Improper access control in Windows Deployment Services allows an unauthorized attacker to execute code over an adjacent network.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Improper access control in Windows Deployment Services directly enables remote code execution via exploitation of the remote service over an adjacent network.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly enforces approved authorizations to mitigate improper access control in Windows Deployment Services, preventing unauthorized adjacent network attackers from executing code.
Requires timely remediation of the identified flaw in Windows Deployment Services, directly addressing the improper access control vulnerability through patching as provided by Microsoft.
Monitors and controls communications at system boundaries to restrict unauthorized adjacent network access to the vulnerable Windows Deployment Services component.