CVE-2026-76693 in EdgeConnect SD-WAN
Summary
by MITRE • 09/15/2026
A vulnerability in HPE Networking EdgeConnect SD-WAN Gateways could allow an unauthenticated remote attacker to cause a denial-of-service against certain services running on impacted Gateways.
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Analysis
by VulDB Data Team • 09/15/2026
The identified security flaw resides within the architecture of Hewlett Packard Enterprise (HPE) Networking EdgeConnect Software-Defined Wide Area Network gateways, presenting a critical risk vector for organizations relying on this infrastructure for secure and efficient network connectivity. This vulnerability specifically targets certain services operating on these gateway devices, allowing an unauthenticated remote attacker to trigger a denial-of-service condition without the need for valid credentials or prior access privileges. The absence of authentication requirements significantly lowers the barrier to entry for malicious actors, enabling anyone with network reachability to exploit this weakness and disrupt critical networking functions.
From a technical perspective, the core issue stems from improper input validation or resource management within the affected services on the EdgeConnect gateway. When an attacker sends specifically crafted requests or packets to these vulnerable endpoints, it causes the service to enter an unstable state, crash, or become unresponsive. This behavior effectively halts the processing of legitimate network traffic managed by that specific service component. In a Software-Defined Wide Area Network environment, such disruptions can lead to significant latency spikes, packet loss, or complete connectivity failures between branch offices and data centers, undermining the reliability promised by SD-WAN solutions.
The operational impact of this vulnerability is substantial for enterprise networks dependent on HPE EdgeConnect gateways. A successful exploitation results in a denial-of-service that degrades network performance or causes total service outages for connected endpoints. Since these gateways often serve as critical choke points for traffic routing, policy enforcement, and security inspection, their unavailability can isolate remote users from corporate resources, disrupt cloud application access, and halt business-critical communications. The lack of authentication means the attack surface is broad, potentially affecting any device on the public internet or internal network segments that have visibility into the gateway management plane or data path services exposed to such interactions.
This vulnerability aligns with Common Weakness Enumeration categories related to improper input validation and resource exhaustion, specifically reflecting patterns where systems fail to adequately verify incoming data before processing it, leading to system instability. In terms of tactical classification under MITRE ATT&CK frameworks, this behavior corresponds to techniques associated with Denial of Service attacks, particularly those involving service disruption through application layer exploitation. The unauthenticated nature of the attack places it within high-severity threat profiles that require immediate attention due to their ease of execution and broad impact potential across distributed network environments.
To mitigate these risks, organizations should immediately apply any available firmware or software updates provided by HPE that address this specific flaw in the EdgeConnect gateway services. If patches are not yet available, implementing strict access control lists at the perimeter firewall level is essential to restrict inbound traffic to vulnerable ports and protocols only from trusted management IP addresses. Additionally, enabling deep packet inspection on upstream firewalls can help identify and block malformed packets characteristic of denial-of-service attempts targeting these specific service endpoints. Continuous monitoring for unusual spikes in error logs or connection drops related to EdgeConnect services will aid in early detection of exploitation attempts while permanent remediation measures are deployed.