CVE-2025-61608 identifies a vulnerability in the NR (New Radio) modem component of Unisoc (Shanghai) Technologies Co., Ltd.'s T8100, T9100, T8200, and T8300 chipsets. These chipsets are integrated into various Android devices running versions 13 through 16. The root cause is improper input validation (CWE-20), which allows specially crafted inputs to trigger a system crash remotely. This results in a denial of service (DoS) condition without requiring any authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). The impact is limited to availability, with no confidentiality or integrity compromise. The vulnerability does not grant additional execution privileges but can disrupt device operation by crashing the modem subsystem, potentially affecting cellular connectivity and device stability. Although no exploits are currently reported in the wild, the low complexity of exploitation and network accessibility make this a credible threat. The absence of patches at the time of publication necessitates vigilance and proactive defense measures. The vulnerability affects a broad range of Android versions, increasing the scope of impacted devices globally.

For European organizations, this vulnerability poses a risk primarily to device availability and operational continuity. Mobile devices utilizing affected Unisoc chipsets could experience unexpected crashes, leading to loss of cellular connectivity and service interruptions. This can impact critical communications, especially in sectors such as telecommunications, emergency services, finance, and transportation that rely on mobile networks. The disruption could degrade productivity, complicate remote work, and impair customer-facing services. Additionally, widespread device instability could strain IT support resources and increase operational costs. While no data breach or privilege escalation is involved, the denial of service effect on mobile endpoints can indirectly affect business processes and user trust. Organizations with large fleets of mobile devices or those deploying IoT solutions based on these chipsets should be particularly cautious. The lack of known exploits currently provides a window for mitigation before active attacks emerge.

1. Monitor Unisoc and device manufacturers for official patches or firmware updates addressing CVE-2025-61608 and apply them promptly upon release. 2. Implement network-level anomaly detection to identify unusual NR modem traffic patterns that could indicate exploitation attempts. 3. Restrict exposure of vulnerable devices to untrusted networks where possible, using VPNs or secure mobile gateways. 4. Employ mobile device management (MDM) solutions to enforce security policies, monitor device health, and facilitate rapid response to crashes or connectivity issues. 5. Educate users and IT staff about the symptoms of modem crashes and establish incident response procedures to minimize downtime. 6. For critical infrastructure, consider redundancy in communication channels to mitigate the impact of potential device outages. 7. Engage with vendors to obtain detailed technical advisories and participate in coordinated vulnerability disclosure programs to stay informed.