CVE-2026-76680 in EdgeConnect SD-WAN Gateways
Summary
by MITRE • 09/15/2026
Vulnerabilities in the API of EdgeConnect SD-WAN Orchestrator could allow a remote attacker authenticated with low privileges to conduct server-side request forgery (SSRF) attacks. A successful exploit allows an attacker to enumerate information about the internal structure of the EdgeConnect SD-WAN Orchestrator host leading to potential disclosure of sensitive information beyond what is authorized by the user's existing privilege level.
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Analysis
by VulDB Data Team • 09/15/2026
The identified vulnerability resides within the application programming interface of the EdgeConnect SD-WAN Orchestrator, a critical component in software-defined wide area network architectures that manages connectivity and policy enforcement across distributed edge locations. This flaw specifically affects authenticated users who possess low-level privileges, indicating that the security boundary intended to restrict access based on role-based permissions is insufficiently enforced at this specific interface endpoint. The core technical deficiency involves an improper validation of user-supplied input when constructing outbound network requests from the server side. By manipulating these inputs, a remote attacker can trick the orchestrator into sending HTTP or other protocol requests to internal resources that are not intended for public access. This class of flaw is formally categorized under CWE-918, which defines Server-Side Request Forgery as a vulnerability where an application fetches a resource specified by the user without validating whether that request should be allowed.
The operational impact of this SSRF vector extends beyond simple network probing. Because the orchestrator typically operates with elevated privileges and has access to internal management networks, cloud metadata services, and other backend infrastructure components, successful exploitation allows an attacker to enumerate the internal topology of the EdgeConnect environment. This includes discovering IP addresses, hostnames, running service versions, and potentially accessing administrative interfaces that are otherwise firewalled or isolated from external traffic. The ability to map these internal structures facilitates further reconnaissance, enabling the attacker to identify additional attack surfaces such as unpatched services on adjacent hosts or misconfigured cloud storage buckets accessible via metadata endpoints. This escalation of information disclosure can lead to a complete compromise of the orchestration layer if combined with other vulnerabilities that target specific backend services identified during this enumeration phase.
From an offensive security perspective, this vulnerability aligns closely with MITRE ATT&CK technique T1598, specifically Subtechnique T1598.002 which covers Phishing for Inbound Data or more broadly SSRF as a method to bypass network controls. The attacker leverages the trusted relationship between the orchestrator and internal services to pivot from a low-privileged external account into the heart of the infrastructure. This is particularly dangerous in SD-WAN deployments where the orchestrator often holds cryptographic keys, routing policies, and authentication tokens for all connected edge devices. If an attacker can induce the server to make requests that interact with these sensitive components, they may extract credentials or configuration data that grants them unauthorized control over network traffic flow, potentially leading to man-in-the-middle attacks or service disruption across multiple sites.
Mitigation strategies must focus on strict input validation and network segmentation principles. Developers should implement a deny-list approach for known internal IP ranges, such as RFC 1918 private address spaces, link-local addresses, and cloud metadata endpoints like 169.254.169.254 commonly used by virtual machines to retrieve instance data. Additionally, using an allow-list of permitted outbound destinations is a more robust defense against SSRF than relying solely on blocklists which can be bypassed through DNS rebinding or other evasion techniques. Network-level controls should also be enforced via firewalls and proxy servers that inspect egress traffic from the orchestrator to ensure it only communicates with explicitly authorized external endpoints. For immediate risk reduction, organizations should apply vendor-provided patches as soon as they become available and review access control lists associated with the affected API endpoint to ensure that low-privileged users do not have write or execute permissions on functions capable of initiating outbound network connections unless absolutely necessary for business operations.