CVE-2026-76673 in EdgeConnect SD-WAN Gateways
Summary
by MITRE • 09/15/2026
Vulnerabilities have been identified in the API of EdgeConnect SD-WAN Orchestrator that could potentially allow an unauthenticated remote actor to circumvent existing authentication controls. Successful exploitation could allow an attacker to gain administrative privileges leading to complete compromise of the EdgeConnect SD-WAN Orchestrator host.
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Analysis
by VulDB Data Team • 09/15/2026
The identified vulnerability resides within the application programming interface of the EdgeConnect Software-Defined Wide Area Network orchestrator, presenting a critical security flaw that undermines fundamental access control mechanisms. This specific weakness allows an unauthenticated remote actor to bypass existing authentication controls without requiring valid credentials or prior network access beyond basic connectivity to the affected service port. The core technical issue involves improper validation of request integrity and identity verification within the API endpoints, enabling attackers to manipulate session tokens or exploit logic errors that trust client-supplied data insufficiently. By leveraging this flaw, an adversary can effectively impersonate legitimate administrative users or inject malicious commands directly into the orchestrator's processing pipeline, thereby circumventing multi-factor authentication and role-based access restrictions designed to protect sensitive network configuration data.
The operational impact of successful exploitation is severe, as it grants the attacker full administrative privileges over the EdgeConnect SD-WAN Orchestrator host. This level of access translates to complete compromise of the underlying system, allowing the adversary to modify global network policies, intercept or alter traffic flows across the entire enterprise WAN infrastructure, and potentially pivot laterally into other connected segments of the corporate network. Since the orchestrator serves as the central management plane for distributed edge devices, compromising it provides a strategic vantage point that can lead to widespread service disruption, data exfiltration from protected networks, and long-term persistence within the organization's digital environment. The ability to execute arbitrary code or modify configurations remotely means that an attacker could disable security logging, install backdoors, or reconfigure routing tables to facilitate further attacks against internal resources that were previously isolated by perimeter defenses.
From a classification perspective, this vulnerability aligns with CWE-287, which describes Improper Authentication, specifically involving the failure to verify identity before granting elevated privileges. It also maps closely to MITRE ATT&CK technique T1078, Valid Accounts, as it involves gaining access through legitimate credentials or by bypassing authentication entirely to assume an administrative role. Furthermore, the exploitation path relates to CWE-294, which covers Authentication Bypass by Capture-replay, if session tokens are intercepted and reused, although in this context, the primary concern is the initial unauthenticated entry point that leads directly to privilege escalation. Understanding these mappings helps security teams contextualize the risk within broader threat landscapes and prioritize remediation efforts based on established industry standards for access control failures.
Mitigation strategies must focus immediately on restricting network-level access to the orchestrator's management interfaces, ensuring they are only reachable from trusted administrative subnets via secure tunnels or VPNs rather than exposed directly to the internet. Organizations should apply vendor-provided patches as soon as they become available, which typically address the specific API validation logic flaws that permit this bypass. Additionally, implementing strict network segmentation and deploying intrusion detection systems with signatures tailored to detect exploitation attempts against SD-WAN orchestrators can provide an additional layer of defense-in-depth. Regular audits of access logs for anomalous login patterns or unauthorized configuration changes are essential for early detection, while enforcing principle of least privilege ensures that even if a breach occurs, the blast radius remains contained within necessary operational boundaries rather than granting unrestricted control over the entire network fabric.