CVE-2026-76692 in EdgeConnect SD-WAN Gateways
Summary
by MITRE • 09/15/2026
A vulnerability in HPE Networking EdgeConnect SD-WAN Gateways could allow an unauthenticated adjacent attacker to obtain limited information from memory and disrupt the normal operation of the affected service. Successful exploitation could result in a denial of service (system crash) or the disclosure of uninitialized stack memory.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability identified within HPE Networking EdgeConnect SD-WAN Gateways represents a significant security risk due to its potential for unauthenticated exploitation by adjacent attackers. This flaw is primarily characterized as an out-of-bounds read condition, which falls under the Common Weakness Enumeration category CWE-125: Out-of-Bounds Read. The nature of this vulnerability allows an attacker who has network access to the affected device's management or data plane interfaces to interact with internal memory structures in unintended ways. Because the attack vector requires adjacency rather than remote internet-wide reachability, it typically targets attackers positioned on the same local network segment as the SD-WAN gateway, such as through a compromised endpoint within the enterprise LAN or via physical access to the network infrastructure.
From a technical perspective, the core issue lies in how the software handles memory allocation and initialization for specific stack variables during service operations. When processing certain requests, the application fails to properly validate input parameters before accessing memory locations on the call stack. This lack of rigorous bounds checking leads to reading uninitialized or sensitive data that resides beyond the intended buffer boundaries. The consequence is twofold: first, it can lead to a denial of service by causing the affected process or the entire system to crash due to illegal memory access violations. Second, and more critically for intelligence gathering, it allows for the disclosure of uninitialized stack memory contents. This disclosed data may contain remnants of previous operations, including cryptographic keys, session tokens, internal IP addresses, or other sensitive configuration details that were not properly cleared from memory before reuse.
The operational impact of this vulnerability is severe because it compromises both the availability and confidentiality aspects of the CIA triad for SD-WAN infrastructure. A successful denial-of-service attack disrupts network connectivity and service continuity, which can halt business operations dependent on stable wide-area networking. The information disclosure aspect poses a long-term threat as leaked memory contents could be leveraged by attackers to facilitate further exploitation steps. For instance, obtaining cryptographic material or session identifiers from stack dumps could allow an attacker to decrypt traffic, impersonate legitimate users, or bypass authentication mechanisms in subsequent attacks. This aligns with the MITRE ATT&CK technique T1082: System Information Discovery, where adversaries gather information about the target environment to plan further intrusions.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary defense is applying the vendor-provided software patch or firmware update that addresses the memory handling logic within the EdgeConnect SD-WAN Gateway components. Organizations should prioritize deploying these updates in a staged manner to ensure service continuity while closing the vulnerability window. In addition to patching, network segmentation plays a crucial role in limiting exposure. By restricting access to management interfaces and critical control plane services from untrusted or general user networks, organizations can reduce the attack surface available to adjacent attackers. Implementing strict firewall rules that limit inbound traffic to only necessary ports and protocols helps mitigate the risk of exploitation by unauthorized entities on the local network segment.
Furthermore, continuous monitoring for anomalous behavior indicative of memory corruption attempts should be integrated into existing security operations center workflows. Intrusion detection systems configured with signatures related to buffer overflow or out-of-bounds read exploits can provide early warning indicators of attempted exploitation. Regular vulnerability assessments and penetration testing focused on SD-WAN components will help identify similar weaknesses before they are exploited in the wild. It is also advisable to review access control policies to ensure that only authorized administrators have network-level access to these critical networking devices, thereby reducing the pool of potential adjacent attackers who could attempt to leverage this flaw for information disclosure or service disruption.