CVE-2025-8825 is a medium-severity OS command injection vulnerability affecting multiple Linksys range extender models, including RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000, specifically in firmware versions up to 20250801. The vulnerability resides in the RP_setBasicAuto function within the /goform/RP_setBasicAuto endpoint. It arises from improper sanitization of the staticIp and staticNetmask parameters, which can be manipulated by an attacker to inject arbitrary operating system commands. This flaw allows remote attackers to execute commands on the device without requiring authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/AT:N/UI:N/PR:L). The vulnerability was publicly disclosed on August 11, 2025, with no vendor response or patch available at the time of disclosure. Although no known exploits are currently observed in the wild, the public availability of the exploit code increases the risk of exploitation. The CVSS 4.0 base score is 5.3, reflecting a medium severity level due to the ease of remote exploitation but limited scope and impact on confidentiality, integrity, and availability. The vulnerability could allow attackers to gain control over the affected devices, potentially enabling network reconnaissance, lateral movement, or use of the compromised device as a pivot point for further attacks within an enterprise or home network environment.

For European organizations, this vulnerability poses a tangible risk, especially for those relying on Linksys range extenders in their network infrastructure. Compromise of these devices could lead to unauthorized network access, interception or manipulation of network traffic, and potential disruption of connectivity. Since range extenders often bridge wireless and wired segments, attackers could leverage this to infiltrate internal networks, bypassing perimeter defenses. This is particularly concerning for small and medium enterprises (SMEs) and home office setups that may lack robust network segmentation or monitoring. Additionally, critical sectors such as healthcare, finance, and government entities using these devices could face data breaches or operational disruptions. The lack of vendor response and patches increases the window of exposure, necessitating proactive mitigation. The medium severity rating suggests that while the vulnerability is not immediately catastrophic, exploitation could facilitate more severe attacks if combined with other vulnerabilities or misconfigurations.

Given the absence of official patches, European organizations should implement immediate compensating controls. First, isolate affected Linksys extenders on dedicated network segments with strict access controls to limit exposure. Disable remote management interfaces or restrict access to trusted IP addresses only. Monitor network traffic for unusual patterns or command injection attempts targeting the /goform/RP_setBasicAuto endpoint. Where possible, replace vulnerable devices with models from vendors with active security support. Employ network intrusion detection/prevention systems (IDS/IPS) configured to detect command injection signatures. Regularly audit device firmware versions and configurations to identify vulnerable units. Educate IT staff and users about the risks and signs of compromise related to these devices. Finally, maintain an incident response plan tailored to IoT and network device compromises to quickly contain and remediate any exploitation.