CVE-2025-29268 identifies a critical security vulnerability in the ALLNET ALL-RUT22GW router firmware version 3.3.8. The issue arises from hardcoded credentials embedded within the libicos.so shared library, which is part of the device's firmware. Hardcoded credentials (CWE-798) represent a severe security flaw because they provide attackers with a fixed set of authentication details that cannot be changed by the user, effectively creating a backdoor. This vulnerability allows an unauthenticated remote attacker to access the device without any user interaction or prior authentication, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). Exploiting this flaw can lead to full compromise of the device, including unauthorized access to network traffic, modification of router configurations, and potential pivoting to internal networks. The vulnerability affects the confidentiality, integrity, and availability of the device and connected networks. Although no public exploits have been reported yet, the critical CVSS score of 9.8 reflects the high risk posed by this vulnerability. The absence of patches or mitigation guidance from the vendor increases the urgency for affected organizations to implement interim protective measures. Given the router's role in network infrastructure, exploitation could disrupt business operations and expose sensitive data.

For European organizations, the impact of CVE-2025-29268 is significant. The ALLNET ALL-RUT22GW router is used in various enterprise and industrial environments, including critical infrastructure sectors such as manufacturing, telecommunications, and public services. Exploitation could lead to unauthorized network access, data exfiltration, and disruption of services. The vulnerability's ease of exploitation without authentication or user interaction means attackers can rapidly compromise multiple devices remotely. This can result in widespread network outages, loss of sensitive information, and potential regulatory penalties under GDPR if personal data is exposed. Additionally, compromised routers can serve as footholds for further attacks, including lateral movement within corporate networks or launching attacks on other connected systems. The lack of available patches increases the risk window, making timely detection and mitigation essential to protect European organizations' operational continuity and data security.

1. Immediately isolate ALLNET ALL-RUT22GW devices from untrusted networks, especially the internet, to prevent remote exploitation. 2. Disable remote management interfaces and services on the affected routers to reduce attack surface. 3. Implement strict network segmentation to limit access to critical systems from vulnerable devices. 4. Monitor network traffic for unusual patterns or unauthorized access attempts targeting the router. 5. Use network intrusion detection/prevention systems (IDS/IPS) to detect exploitation attempts related to hardcoded credential abuse. 6. Engage with ALLNET support channels to obtain information on forthcoming patches or firmware updates addressing this vulnerability. 7. If possible, replace affected devices with alternative hardware that does not contain this vulnerability. 8. Conduct regular security audits and vulnerability assessments focusing on network infrastructure devices. 9. Educate IT staff about the risks of hardcoded credentials and the importance of secure device configuration. 10. Prepare incident response plans to quickly contain and remediate any compromise resulting from this vulnerability.