CVE-2025-15349 is a race condition vulnerability categorized under CWE-362, affecting the SCPI (Standard Commands for Programmable Instruments) component of Anritsu ShockLine devices, specifically version 2025.4.1. The vulnerability stems from improper synchronization when multiple threads or processes concurrently access and modify shared resources without adequate locking mechanisms. This flaw allows a network-adjacent attacker to exploit timing windows to execute arbitrary code remotely within the context of the ShockLine process. Notably, exploitation does not require authentication or user interaction, though the attack complexity is high due to the need to trigger the race condition precisely. The vulnerability impacts confidentiality, integrity, and availability by enabling arbitrary code execution, potentially leading to full system compromise or disruption of network testing operations. The vulnerability was assigned a CVSS v3.0 score of 7.5, reflecting its high severity with attack vector as adjacent network, high attack complexity, no privileges required, and no user interaction. No public exploits or patches are currently available, but the vulnerability was responsibly disclosed and tracked as ZDI-CAN-27315. The Anritsu ShockLine product is widely used in telecommunications for network performance testing, making this vulnerability particularly critical in environments relying on accurate and secure network diagnostics.

For European organizations, the impact of CVE-2025-15349 can be significant, especially for telecommunications providers, network equipment vendors, and enterprises relying on Anritsu ShockLine for network testing and diagnostics. Successful exploitation could lead to unauthorized code execution, allowing attackers to manipulate test results, disrupt network performance monitoring, or pivot into broader network infrastructure. This could compromise the confidentiality of sensitive network data, integrity of diagnostic results, and availability of testing services, potentially delaying incident response and network maintenance. Given the critical role of telecommunications in Europe’s digital economy and infrastructure, such disruptions could have cascading effects on service providers and their customers. Additionally, the lack of authentication requirement increases the risk of exploitation from internal or adjacent network attackers, including malicious insiders or compromised devices within the same network segment. The high attack complexity somewhat limits widespread exploitation but does not eliminate risk in targeted attacks against critical infrastructure.

1. Monitor Anritsu’s official channels closely for the release of security patches addressing CVE-2025-15349 and apply them immediately upon availability. 2. Restrict network access to ShockLine devices by implementing strict network segmentation and firewall rules to limit access only to trusted management hosts. 3. Employ network intrusion detection and prevention systems (IDS/IPS) to monitor for anomalous SCPI command sequences or unusual traffic patterns indicative of exploitation attempts. 4. Conduct regular security audits and configuration reviews of ShockLine deployments to ensure minimal exposure and adherence to security best practices. 5. Where possible, disable or restrict SCPI interfaces on devices not actively used for remote management or testing. 6. Educate network operations teams about the vulnerability and signs of exploitation to enhance detection and response capabilities. 7. Consider deploying endpoint protection solutions capable of detecting unusual process behaviors on devices running ShockLine software. 8. Maintain up-to-date asset inventories to quickly identify and remediate vulnerable devices within the network.