CVE-2026-76695 in EdgeConnect SD-WAN Gateways
Summary
by MITRE • 09/15/2026
Buffer overflow vulnerabilities exist in the underlying operating system of HPE Networking EdgeConnect SD-WAN Gateways that could allow an unauthenticated remote attacker to send specially crafted packets to the affected service. Successful exploitation could allow an attacker to affect the integrity and availability of the affected service.
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Analysis
by VulDB Data Team • 09/15/2026
The identified vulnerability represents a critical security flaw within the underlying operating system components of HPE Networking EdgeConnect SD-WAN Gateways, specifically manifesting as a buffer overflow condition. This type of memory corruption error occurs when a program or process attempts to write more data to a fixed-length block of memory than it is allocated to hold. In the context of network-facing services on these gateways, this flaw allows an unauthenticated remote attacker to interact with the affected service by sending specially crafted packets designed to exceed the expected buffer boundaries. The absence of proper input validation or bounds checking in the handling of incoming network traffic creates a direct pathway for exploitation without requiring any form of user authentication or prior access credentials.
From a technical perspective, this vulnerability aligns closely with CWE-120, which classifies Buffer Copy without Checking Size of Input Classic Buffer Overflow. The attacker leverages this weakness to overwrite adjacent memory locations, potentially overwriting critical control data such as return addresses on the stack or function pointers in heap structures. Depending on the specific implementation details and the version of the operating system involved, successful exploitation could lead to arbitrary code execution with the privileges of the affected service process. This capability fundamentally compromises the integrity of the gateway's operational environment, allowing an adversary to inject malicious payloads, modify system configurations, or establish persistent backdoors within the network infrastructure.
The operational impact of this vulnerability is severe due to its remote and unauthenticated nature. An attacker located anywhere on the internet can target the SD-WAN gateway without needing prior access to the internal network. By exploiting this buffer overflow, an adversary can disrupt the availability of critical networking services managed by the EdgeConnect platform. This disruption may result in service outages for connected branch offices or data centers that rely on the SD-WAN overlay for connectivity and policy enforcement. Furthermore, if code execution is achieved, the attacker gains a foothold within the network perimeter, potentially using the compromised gateway as a pivot point to launch lateral attacks against other internal systems, exfiltrate sensitive data, or disrupt organizational operations through ransomware deployment or destructive malware installation.
This scenario maps directly to several techniques in the MITRE ATT&CK framework, particularly T1190 Exploit Public-Facing Application and T1203 Exploitation for Client Execution. The vulnerability serves as an initial access vector that bypasses traditional authentication controls, highlighting a gap in perimeter defense mechanisms. To mitigate this risk, immediate action is required to apply the vendor-provided security patches or firmware updates that address the underlying memory management flaws within the operating system components of the EdgeConnect SD-WAN Gateways. Organizations should also implement network-level mitigations such as strict ingress filtering and rate limiting on public-facing interfaces to reduce the attack surface until patching can be completed. Regular vulnerability scanning focused on unauthenticated remote services is recommended to detect similar exposures across the infrastructure, ensuring that all edge devices are maintained with the latest security fixes from HPE.