CVE-2026-69802 in Windows
Summary
by MITRE • 10/14/2026
Weak authentication in Network Device Enrollment Service (NDES) allows an unauthorized attacker to execute code over a network.
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Analysis
by VulDB Data Team • 10/14/2026
The vulnerability identified within the Network Device Enrollment Service, commonly referred to as NDES, represents a critical failure in access control mechanisms that governs how devices authenticate when seeking certificates from a Microsoft Enterprise Certificate Authority. This service acts as a bridge between non-Windows or legacy systems and Active Directory-based certificate infrastructure, allowing them to request digital certificates via simple web protocols rather than complex PKI standards like SCEP or EST. The core technical flaw lies in the authentication logic implemented within the NDES component, specifically where it fails to adequately verify the identity of the requesting entity before processing enrollment requests. This weakness effectively allows an attacker who has network access to bypass intended security restrictions and interact with the service as if they were a legitimate, authorized device or user. The absence of robust credential validation means that the system does not sufficiently challenge unauthenticated connections, creating a pathway for remote code execution without requiring prior valid credentials on the target domain.
From an operational perspective, this vulnerability enables a remote attacker to execute arbitrary code on vulnerable systems with significant privileges depending on the context in which NDES operates. If the service is running under high-privilege accounts such as SYSTEM or Domain Admins, successful exploitation can lead to complete compromise of the underlying operating system and potentially the entire Active Directory environment. The impact extends beyond simple unauthorized access; it facilitates lateral movement within a network by allowing attackers to obtain valid digital certificates that can be used for further attacks, including Kerberoasting, Golden Ticket creation, or impersonation of trusted services. This undermines the fundamental trust model of public key infrastructure, as forged certificates issued through this flaw carry the same weight and validity as those legitimately requested, thereby eroding integrity across secure communications channels established using these compromised credentials.
The technical nature of this weakness aligns closely with CWE-287, which describes Improper Authentication, where an actor is able to bypass authentication controls due to a logic error or misconfiguration rather than a simple buffer overflow or injection flaw. In the context of modern attack frameworks, this vulnerability maps directly to MITRE ATT&CK technique T1078, Valid Accounts, as it allows adversaries to use legitimate credentials or impersonate valid entities without detection. Furthermore, because NDES is often exposed on internal network segments but occasionally configured for external access in hybrid environments, the exploitability vector can vary from local privilege escalation to remote exploitation over a wide area network if firewall rules are permissive. The lack of strict input validation and session management during the enrollment handshake process provides multiple avenues for crafting malicious payloads that trigger code execution upon processing by the NDES service handler.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Organizations should immediately apply vendor-provided security patches to update the NDES component, ensuring that all authentication checks are enforced according to current best practices. It is crucial to restrict network access to NDES services using strict firewall rules, limiting connectivity only to known, authorized enrollment agents rather than open internet or broad internal subnets. Additionally, administrators should review and harden the permissions assigned to service accounts running NDES, adhering to the principle of least privilege by ensuring these accounts do not possess domain admin rights unless absolutely necessary for specific legacy integrations that cannot be migrated away from SCEP/NDES protocols. Implementing multi-factor authentication where supported and monitoring logs for anomalous certificate request patterns can also provide early detection capabilities against exploitation attempts targeting this weakness.