CVE-2025-37124 is a high-severity vulnerability affecting Hewlett Packard Enterprise's Aruba Networking EdgeConnect SD-WAN Gateway products, specifically versions 9.4.0.0 and 9.5.0.0. This vulnerability allows an unauthenticated remote attacker to bypass firewall protections on the affected SD-WAN gateways. The core issue lies in the gateway's failure to properly enforce firewall rules, enabling malicious actors to route harmful traffic through the internal network. This unauthorized routing can lead to multiple adverse outcomes, including unauthorized access to sensitive internal resources and disruption of critical network services. The vulnerability has a CVSS v3.1 base score of 8.6, reflecting its high impact with characteristics such as network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The impact scope is unchanged (S:U), with confidentiality and integrity impacts rated low (C:L, I:L) but availability impact rated high (A:H), indicating potential significant service disruption. No known exploits are currently reported in the wild, but the lack of authentication and ease of exploitation make this a critical concern for organizations relying on these SD-WAN gateways for secure network connectivity and segmentation. The vulnerability highlights a critical weakness in the perimeter defense mechanism of the SD-WAN gateway, potentially allowing attackers to circumvent established firewall policies and gain a foothold inside the protected network environment.

For European organizations, the exploitation of CVE-2025-37124 could have severe consequences. Many enterprises and service providers in Europe utilize HPE Aruba Networking SD-WAN solutions to manage and secure their wide-area networks, especially given the increasing adoption of cloud services and remote work infrastructures. Successful exploitation could lead to unauthorized lateral movement within corporate networks, exposing sensitive data and intellectual property to compromise. Additionally, disruption of availability could affect critical business operations, including financial transactions, supply chain communications, and customer-facing services. Given the high availability impact, sectors such as finance, healthcare, telecommunications, and government agencies in Europe could face operational outages or degraded service quality. The ability to bypass firewall protections without authentication also raises concerns about insider threats or external attackers gaining initial access through other vectors and then leveraging this vulnerability to escalate privileges and move laterally. This could undermine compliance with European data protection regulations such as GDPR, leading to legal and reputational consequences.

To mitigate the risk posed by CVE-2025-37124, European organizations should prioritize the following actions: 1) Immediate deployment of vendor-supplied patches or firmware updates once available, as no patch links are currently provided but should be monitored closely on HPE's official security advisories. 2) Implement network segmentation to isolate SD-WAN gateways from critical internal resources, minimizing the impact of potential exploitation. 3) Employ strict ingress and egress filtering on network perimeters to detect and block anomalous routing or unauthorized traffic flows that could indicate exploitation attempts. 4) Enhance monitoring and logging on SD-WAN gateways and associated network infrastructure to detect unusual traffic patterns or firewall rule bypass attempts. 5) Restrict management interfaces of the SD-WAN gateways to trusted administrative networks and enforce multi-factor authentication to reduce the risk of unauthorized configuration changes. 6) Conduct regular security assessments and penetration testing focusing on SD-WAN components to identify potential exploitation paths. 7) Educate network and security teams about this vulnerability to ensure rapid incident response readiness. These measures, combined with timely patching, will help reduce the attack surface and limit the potential damage from exploitation.