CVE-2025-27211 is a security vulnerability identified in Ubiquiti Inc's EdgeMAX EdgeSwitch product, specifically affecting versions 1.10.4 and earlier. The vulnerability arises from improper input validation within the EdgeSwitch firmware or software. This flaw allows a malicious actor who has access to the network adjacent to the EdgeSwitch device to perform command injection attacks. Command injection vulnerabilities enable attackers to execute arbitrary commands on the underlying operating system with the privileges of the vulnerable application, potentially leading to full system compromise. Since the attacker must have access to the EdgeSwitch adjacent network, the attack vector is limited to internal or closely connected networks rather than remote internet-based exploitation. However, once exploited, the attacker could manipulate network traffic, disrupt switching operations, or pivot to other internal systems. The lack of a CVSS score indicates that the vulnerability has been recently published and not yet fully assessed for severity. No known exploits are currently reported in the wild, and no patches or mitigation links have been provided at this time. The vulnerability was reserved in February 2025 and published in August 2025, indicating recent discovery and disclosure.

For European organizations, this vulnerability poses a significant risk, especially for enterprises and service providers relying on Ubiquiti EdgeMAX EdgeSwitch devices for their network infrastructure. Successful exploitation could lead to unauthorized command execution on network switches, resulting in potential network outages, interception or manipulation of network traffic, and lateral movement within corporate networks. This could compromise confidentiality, integrity, and availability of critical business systems. Given the importance of network infrastructure in sectors such as finance, healthcare, manufacturing, and government, exploitation could disrupt operations and lead to data breaches or service downtime. The requirement for adjacency limits remote exploitation but does not eliminate risk, as insider threats or compromised devices within the local network could serve as attack launch points. The absence of known exploits currently reduces immediate risk but organizations should act proactively to prevent future exploitation.

European organizations using EdgeMAX EdgeSwitch devices should immediately conduct a thorough inventory to identify affected versions (1.10.4 and earlier). Until a patch is released, network segmentation should be enforced to restrict access to the EdgeSwitch management interfaces and adjacent networks only to trusted administrators and systems. Implement strict access control lists (ACLs) and network access control (NAC) to limit exposure. Monitoring and logging of network switch management traffic should be enhanced to detect unusual commands or access patterns. Employ multi-factor authentication for device management interfaces where possible. Organizations should subscribe to Ubiquiti security advisories to receive updates on patches or mitigations. Additionally, consider deploying intrusion detection/prevention systems (IDS/IPS) tuned to detect command injection attempts or anomalous traffic on the management network. Regularly review and update device firmware once patches become available to remediate the vulnerability definitively.