CVE-2025-29228 identifies a command injection vulnerability in the Linksys E5600 router firmware version 1.1.0.26. The flaw resides in the runtime.macClone function, specifically through the mc.ip parameter, which fails to properly sanitize user input. Command injection vulnerabilities allow attackers to execute arbitrary system commands with the privileges of the affected application—in this case, the router’s firmware. Exploiting this vulnerability could enable an attacker to gain unauthorized control over the device, potentially leading to network compromise, interception or manipulation of traffic, and disruption of services. Although no CVSS score or patch links are currently available, the vulnerability is publicly disclosed and reserved under CVE-2025-29228. No known exploits have been reported in the wild yet, but the nature of command injection makes it a critical risk if weaponized. The lack of authentication or user interaction requirements is not explicitly stated, but such vulnerabilities often can be exploited remotely if the management interface is exposed. The absence of patch information suggests that vendors or users should be vigilant for forthcoming updates. The vulnerability affects a widely used consumer and small business router model, which may be deployed in various organizational environments, including European enterprises and critical infrastructure.

For European organizations, this vulnerability poses a significant risk to network security. Compromise of Linksys E5600 routers could allow attackers to intercept sensitive communications, launch further attacks within the internal network, or cause denial of service by disrupting router functionality. Confidentiality is at risk due to potential data interception; integrity can be compromised by altering network traffic or configurations; availability may be affected if the router is disabled or rebooted maliciously. Small and medium enterprises, as well as home office setups relying on these routers, are particularly vulnerable due to potentially weaker perimeter defenses. The impact is amplified in sectors with critical infrastructure or sensitive data, such as finance, healthcare, and government agencies. Additionally, if exploited remotely, attackers could leverage this vulnerability to establish persistent footholds within European networks. The absence of known exploits currently limits immediate risk, but the public disclosure increases the likelihood of future exploitation attempts.

Organizations should immediately audit their network environments to identify the presence of Linksys E5600 routers, especially firmware version 1.1.0.26. Until a vendor patch is released, restrict access to the router’s management interfaces by implementing network segmentation and firewall rules that limit connections to trusted administrative hosts. Disable remote management features if not required, and enforce strong authentication mechanisms. Monitor router logs and network traffic for unusual activity indicative of exploitation attempts. Employ intrusion detection/prevention systems to detect command injection patterns targeting the mc.ip parameter or related functions. Prepare for rapid deployment of vendor patches once available, and maintain an inventory of affected devices to ensure timely updates. Additionally, consider replacing vulnerable devices with models that have a stronger security posture if patching is delayed. Educate IT staff about this vulnerability and encourage vigilance against phishing or social engineering that could facilitate exploitation.