The vulnerability identified as CVE-2025-29268 affects the ALLNET ALL-RUT22GW router, specifically firmware version 3.3.8. The issue arises from hardcoded credentials embedded within the libicos.so shared library, a component likely responsible for certain device functionalities. Hardcoded credentials are a critical security flaw because they cannot be changed by the user and can be extracted by attackers who gain any level of access to the device or its firmware. This exposure can lead to unauthorized administrative access, allowing attackers to manipulate router configurations, intercept or redirect network traffic, and potentially pivot to other devices within the network. Although no public exploits have been reported, the vulnerability's presence in network infrastructure devices makes it a high-value target for attackers. The lack of a CVSS score suggests this is a recently published issue, and no official patch or mitigation guidance has been released by ALLNET as of the publication date. The vulnerability was reserved in March 2025 and published in December 2025, indicating a relatively recent discovery. The absence of authentication or user interaction requirements for exploitation is not explicitly stated, but hardcoded credentials typically facilitate straightforward unauthorized access once the device or firmware is accessible. This vulnerability underscores the risks of embedded credentials in network hardware, which can undermine the security of entire organizational networks.

For European organizations, the exploitation of this vulnerability could lead to severe consequences including unauthorized access to network infrastructure, interception of sensitive communications, and disruption of network services. Attackers gaining control over the ALLNET ALL-RUT22GW routers could manipulate routing tables, launch man-in-the-middle attacks, or use the compromised devices as footholds for further attacks within the corporate network. This could result in data breaches, loss of data integrity, and potential downtime affecting business operations. Critical sectors such as finance, healthcare, and government institutions that rely on secure and stable network infrastructure are particularly at risk. Additionally, the presence of hardcoded credentials can facilitate automated attacks, increasing the likelihood of widespread exploitation if the vulnerability becomes publicly known. The lack of available patches increases the window of exposure, necessitating immediate compensating controls to reduce risk.

Organizations should immediately inventory their network devices to identify any ALLNET ALL-RUT22GW routers running firmware version 3.3.8. If possible, contact ALLNET for firmware updates or security advisories addressing this vulnerability. In the absence of patches, implement strict network segmentation to isolate affected routers from sensitive internal networks and limit administrative access to trusted personnel only. Employ network monitoring to detect unusual traffic patterns or unauthorized access attempts targeting these devices. Change default management interfaces to non-standard ports and disable remote management features if not required. Use VPNs or secure tunnels for remote access to router management interfaces to reduce exposure. Regularly audit device configurations and firmware integrity to detect unauthorized changes. Consider replacing affected devices with models from vendors that follow secure development practices and do not embed hardcoded credentials.