CVE-2025-12274 is a buffer overflow vulnerability identified in the Tenda CH22 router firmware version 1.0.0.1. The flaw exists in the fromP2pListFilter function, specifically in the handling of the 'page' argument passed to the /goform/P2pListFilter endpoint. Improper validation or bounds checking of this input allows an attacker to overflow a buffer, leading to potential arbitrary code execution on the device. The vulnerability can be exploited remotely over the network without requiring authentication or user interaction, making it highly accessible to attackers. The CVSS 4.0 score of 8.7 reflects the vulnerability's high impact on confidentiality, integrity, and availability, as successful exploitation could allow attackers to take full control of the router, intercept or manipulate network traffic, or disrupt network services. Although no known exploits are currently active in the wild, the public disclosure of exploit code increases the likelihood of exploitation attempts. The vulnerability affects a widely used consumer and small business router model, which may be deployed in various organizational environments. The absence of an official patch at the time of disclosure necessitates immediate mitigation efforts to reduce exposure. The vulnerability's exploitation vector is network-based, with low attack complexity and no privileges or user interaction required, making it a critical risk for affected deployments.

For European organizations, exploitation of CVE-2025-12274 could lead to severe consequences including unauthorized access to internal networks, interception of sensitive communications, and disruption of network availability. Compromised routers can serve as entry points for lateral movement within corporate networks or as platforms for launching further attacks such as man-in-the-middle, data exfiltration, or denial-of-service. Small and medium enterprises relying on Tenda CH22 devices for internet connectivity or VPN termination are particularly vulnerable. Critical infrastructure sectors such as finance, healthcare, and government agencies could face operational disruptions or data breaches if these devices are compromised. Additionally, the widespread use of Tenda routers in home offices due to increased remote work trends in Europe amplifies the risk of supply chain and endpoint attacks. The remote, unauthenticated nature of the exploit means attackers can target vulnerable devices en masse, potentially leading to large-scale botnets or coordinated attacks affecting multiple organizations across Europe.

1. Immediately inventory all Tenda CH22 devices running firmware version 1.0.0.1 within the organization. 2. Monitor vendor communications closely for official firmware updates or patches addressing CVE-2025-12274 and apply them promptly upon release. 3. Until patches are available, restrict network access to the /goform/P2pListFilter endpoint by implementing firewall rules or access control lists that limit inbound traffic to trusted sources only. 4. Segment networks to isolate vulnerable routers from critical systems and sensitive data environments to contain potential compromises. 5. Deploy intrusion detection or prevention systems (IDS/IPS) with signatures or heuristics tuned to detect exploitation attempts targeting this vulnerability. 6. Conduct regular network traffic analysis to identify anomalous requests to the vulnerable endpoint or unusual router behavior. 7. Educate IT staff and users about the risks associated with this vulnerability and encourage reporting of suspicious network activity. 8. Consider temporary replacement of vulnerable devices with alternative hardware if patching is delayed or infeasible. 9. Implement strong network authentication and encryption mechanisms to reduce the impact of potential router compromise. 10. Maintain up-to-date backups and incident response plans to enable rapid recovery in case of exploitation.