CVE-2026-69694 in Windows
Summary
by MITRE • 09/09/2026
Deserialization of untrusted data in Windows IP Address Management (IPAM) Service allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified involves a critical deserialization flaw within the Windows Internet Protocol Address Management, commonly referred to as IPAM service. This component is responsible for managing and monitoring IP address spaces across enterprise networks, handling tasks such as DHCP server management, DNS server integration, and IP address allocation tracking. The core technical issue stems from the improper validation of input data prior to its deserialization process. When the IPAM service processes specific requests or configuration updates, it accepts serialized objects that are not sufficiently sanitized against malicious payloads. This lack of rigorous type checking allows an attacker who has already gained authorized access to the system to inject crafted binary data into the stream. Upon processing this untrusted input, the application instantiates arbitrary classes defined by the attacker rather than expected legitimate types, leading to a breakdown in security boundaries and resulting in local privilege escalation.
From a technical perspective, this flaw aligns with CWE-502, which describes Deserialization of Untrusted Data. The vulnerability exploits the inherent risks associated with object serialization frameworks that allow for polymorphic instantiation without strict schema validation or type whitelisting. In the context of Windows IPAM, the service operates with elevated system privileges to perform network management tasks effectively. Consequently, when an attacker successfully triggers this deserialization flaw, they can execute arbitrary code within the security context of the IPAM process. This typically runs under high-privilege accounts such as SYSTEM or domain administrators depending on the specific deployment configuration. The ability to instantiate and invoke methods from untrusted classes provides a direct path for command execution, allowing the attacker to bypass standard user-level restrictions and gain full control over the affected host.
The operational impact of this vulnerability is severe due to its potential for local privilege escalation. An authorized attacker, such as a legitimate network administrator or any user with access credentials to the IPAM service interface, can leverage this flaw to escalate their privileges from a standard user account to that of an administrator or system-level entity. This transformation effectively neutralizes existing access controls and allows the adversary to install malware, create new administrative accounts, modify security policies, or exfiltrate sensitive data stored on the server. Furthermore, because IPAM often serves as a central point for network infrastructure management, compromising this service can provide lateral movement opportunities within the broader enterprise environment. The attacker may use the elevated privileges to pivot to other critical systems, such as domain controllers or DHCP servers, thereby expanding their footprint and increasing the overall risk of a widespread breach.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Microsoft has addressed this issue through specific security updates that patch the underlying deserialization logic within the IPAM service components. Organizations should prioritize applying these patches to all affected Windows Server versions running the IPAM role. In addition to patching, implementing strict input validation is crucial; developers and administrators should ensure that only expected data types are processed by serialization mechanisms. Principle of least privilege should be enforced strictly for accounts interacting with IPAM services, ensuring that no single account has unnecessary administrative rights unless absolutely required. Network segmentation can also limit the blast radius if a compromise occurs, preventing easy lateral movement from the compromised IPAM server to other critical infrastructure assets.
This vulnerability is categorized under ATT&CK technique T1059, specifically Command and Scripting Interpreter variants often used in conjunction with privilege escalation techniques like T1068 Exploitation for Privilege Escalation. Security teams should monitor logs related to the IPAM service for unusual activity patterns that might indicate exploitation attempts, such as unexpected process creations or modifications to system configurations following interactions with the IPAM interface. Continuous monitoring and regular vulnerability assessments are essential to maintain a robust security posture against similar deserialization flaws in other enterprise services. By addressing this weakness promptly and reinforcing access controls, organizations can significantly reduce their exposure to privilege escalation attacks targeting network management infrastructure.