CVE-2025-27058 is a high-severity buffer overflow vulnerability (CWE-120) found in several Qualcomm Snapdragon components, specifically affecting FastConnect 6900, FastConnect 7800, SC8380XP, WCD9380, WCD9385, WSA8840, WSA8845, and WSA8845H chipsets. The vulnerability arises from improper handling of packet data with exceedingly large packets, leading to memory corruption due to a buffer copy operation that does not verify the size of the input before copying. This classic buffer overflow flaw can result in arbitrary code execution, privilege escalation, or denial of service. The CVSS v3.1 base score is 7.8, indicating a high impact on confidentiality, integrity, and availability. The attack vector is local (AV:L), requiring low privileges (PR:L) but no user interaction (UI:N), and the scope remains unchanged (S:U). Exploitation could allow an attacker with limited access to the device to execute malicious code or crash the system by sending specially crafted packets that trigger the overflow. Although no known exploits are currently in the wild, the vulnerability's presence in widely used Snapdragon wireless connectivity components makes it a significant risk, especially for mobile devices and embedded systems relying on these chipsets. Qualcomm has not yet published patches, increasing the urgency for mitigation and monitoring.

For European organizations, the impact of CVE-2025-27058 is substantial, particularly for enterprises and sectors heavily reliant on mobile communications, IoT devices, and embedded systems using Qualcomm Snapdragon chipsets. Successful exploitation could lead to unauthorized access to sensitive data, disruption of critical communication services, and potential compromise of corporate mobile devices. This could affect sectors such as telecommunications, finance, healthcare, and government agencies where confidentiality and availability are paramount. The local attack vector implies that attackers need some level of access to the device, such as through compromised apps or insider threats, but no user interaction is required, increasing the risk of stealthy exploitation. The vulnerability could also be leveraged as a foothold for lateral movement within corporate networks if mobile devices are connected to internal systems. Given the widespread use of Snapdragon chipsets in smartphones and IoT devices across Europe, the potential for large-scale impact exists if attackers develop reliable exploits.

Organizations should implement a multi-layered mitigation strategy: 1) Monitor vendor communications closely for official patches or firmware updates from Qualcomm and device manufacturers and apply them promptly once available. 2) Restrict local access to devices by enforcing strict device usage policies, limiting installation of untrusted applications, and employing mobile device management (MDM) solutions to control and monitor device configurations. 3) Use network segmentation to isolate critical systems from potentially vulnerable mobile or IoT devices. 4) Deploy endpoint detection and response (EDR) tools capable of identifying anomalous behavior indicative of exploitation attempts, such as unusual packet processing or memory corruption events. 5) Educate users and administrators about the risks of local privilege escalation vulnerabilities and encourage vigilance against suspicious device behavior. 6) Where possible, disable or limit features that process large or untrusted packets in affected components until patches are available. 7) Collaborate with device vendors to obtain interim mitigations or firmware updates.