CVE-2025-26633 in Windows
Summary
by MITRE • 03/11/2025
Improper neutralization in Microsoft Management Console allows an unauthorized attacker to bypass a security feature locally.
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Analysis
by VulDB Data Team • 04/09/2026
The vulnerability identified as CVE-2025-26633 represents a critical weakness in Microsoft Management Console (MMC) that stems from improper neutralization of input within the management framework. This flaw exists within the core security mechanisms of MMC, which is a fundamental component of Windows operating systems used for system administration and configuration management. The issue manifests when the console fails to properly sanitize or validate input parameters that are processed during the execution of management tasks, creating a potential attack vector for malicious actors who seek to exploit local security controls. The vulnerability specifically targets the input handling processes within MMC's security architecture, where insufficient neutralization allows crafted inputs to bypass intended access controls and security features.
This technical weakness falls under the broader category of improper input validation and neutralization, aligning with CWE-20 which addresses "Improper Input Validation" and CWE-170 which covers "Improper Null Termination". The vulnerability operates at the system level within the Windows management infrastructure, leveraging the trust model that exists between MMC and the underlying operating system components. Attackers can exploit this flaw by crafting specific input sequences or parameters that are processed by MMC, allowing them to circumvent local security features that should normally restrict unauthorized access to system management functions. The attack requires local system access and leverages the trusted execution environment of MMC to bypass security boundaries that typically protect sensitive administrative operations.
The operational impact of CVE-2025-26633 extends significantly within enterprise environments where MMC is extensively utilized for administrative tasks and system monitoring. Organizations relying on MMC for routine management operations face potential unauthorized access to critical system functions, including registry modifications, service management, and configuration changes that could compromise system integrity. The vulnerability's local nature means that an attacker must already have access to the target system, but once exploited, could provide elevated privileges or bypass security controls that protect against unauthorized modifications. This weakness particularly affects environments where multiple administrative users interact with MMC, as it could enable privilege escalation or unauthorized access to sensitive management features that are normally restricted to authorized administrators.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation" and T1547 which addresses "Registry Run Keys / Startup Folder'. The attack surface is particularly concerning in environments where administrative credentials are stored or where MMC is used in conjunction with other administrative tools that may share common security contexts. Mitigation strategies should focus on implementing proper input validation within MMC components, applying timely security patches from Microsoft, and employing additional administrative controls such as least privilege principles and enhanced monitoring of MMC usage. Organizations should also consider implementing application whitelisting policies and restricting local administrative access to minimize the potential impact of such vulnerabilities. The remediation process requires coordinated patch management across all affected Windows systems and validation of administrative access controls to ensure that the security boundaries established by MMC are properly maintained.