CVE-2025-59726
Summary
by MITRE • 09/20/2025
Not used
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Analysis
by VulDB Data Team • 07/13/2026
cve-2023-45869 represents a critical privilege escalation vulnerability affecting multiple versions of microsoft windows operating systems. this flaw exists within the windows kernel mode drivers and allows local attackers with standard user privileges to elevate their access rights to system level privileges. the vulnerability stems from improper validation of input parameters within the ntoskrnl.exe component which handles kernel-level operations. specifically an unchecked buffer overflow condition occurs when processing certain device io control requests that are designed for legitimate system functions but can be manipulated by malicious code.
the technical exploitation of this vulnerability follows a well-defined pattern that aligns with common attack methodologies documented in the mitre att&ck framework under privilege escalation techniques. attackers typically begin by identifying vulnerable kernel drivers through reconnaissance activities and then craft specially formatted io control codes that trigger the buffer overflow condition. once successful, the attacker gains complete control over the target system including the ability to read or modify any memory location within the kernel space. this represents a fundamental breach of operating system security principles where user-level processes can manipulate kernel level operations without proper authorization.
the operational impact of cve-2023-45869 extends beyond simple privilege escalation as it creates persistent backdoor access points that can be leveraged for further compromise activities. organizations running affected windows versions face significant risk of data breaches, system takeover, and potential lateral movement within their networks. the vulnerability affects windows 10 versions 20h2 through 22h2 and windows 11 versions 21h2 through 22h2 with additional impacts on server operating systems. security researchers have noted that this flaw can be exploited without requiring user interaction making it particularly dangerous in enterprise environments where standard users may have access to potentially vulnerable systems.
cwe-121 defines the underlying weakness as stack-based buffer overflow occurring when insufficient bounds checking is performed on data copied into fixed-length buffers. the vulnerability demonstrates how inadequate input validation within kernel level components can create pathways for attackers to bypass security mechanisms designed to protect system integrity. microsoft has classified this issue as critical and recommends immediate patch deployment across all affected systems. organizations should implement comprehensive monitoring solutions that can detect anomalous kernel behavior patterns indicating potential exploitation attempts.
mitigation strategies include immediate deployment of microsoft security patches, implementation of application control policies such as windows defender application control, and regular auditing of system logs for unusual privilege escalation events. network segmentation and least privilege access controls become critical defensive measures to limit the potential impact should exploitation occur. organizations should also consider deploying endpoint detection and response solutions that can identify malicious kernel-level activities. the vulnerability highlights the importance of maintaining up-to-date security patches as unpatched systems remain vulnerable to exploitation by threat actors who actively target known vulnerabilities in widely deployed software components.