CVE-2026-30282 is an arbitrary file overwrite vulnerability identified in UXGROUP LLC's Cast to TV Screen Mirroring application, specifically version 2.2.77. The vulnerability arises from insecure handling of the file import process, allowing an attacker to overwrite critical internal files. This is facilitated by path traversal and improper file validation, corresponding to CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) and CWE-73 (External Control of File Name or Path). Exploitation requires the attacker to have limited privileges (PR:L) and user interaction (UI:R), but no complex authentication is necessary. The vulnerability has a CVSS v3.1 base score of 9.0, indicating critical severity with network attack vector (AV:N), low attack complexity (AC:L), and impacts on confidentiality, integrity, and availability (C:H/I:H/A:H). Successful exploitation can lead to arbitrary code execution, allowing attackers to execute malicious code with the application's privileges, or cause information exposure by overwriting sensitive files. No patches or known exploits are currently reported, but the vulnerability's nature demands urgent attention. The vulnerability affects the core functionality of the application, which is widely used for screen mirroring, potentially impacting numerous users and organizations relying on this technology for presentations, remote collaboration, or media streaming.

The impact of CVE-2026-30282 is severe for organizations using the affected Cast to TV Screen Mirroring application. Arbitrary file overwrite can lead to full compromise of the application, enabling attackers to execute arbitrary code, potentially escalating privileges or moving laterally within networks. Confidential information may be exposed or corrupted, and critical system files could be overwritten, causing denial of service or system instability. Given the application's role in media streaming and screen sharing, exploitation could disrupt business operations, leak sensitive presentation data, or serve as a foothold for further attacks. The vulnerability's network attack vector and low complexity make it accessible to remote attackers, increasing the risk of widespread exploitation once weaponized. Organizations in sectors relying heavily on remote collaboration and media sharing are particularly vulnerable, as attackers could exploit this flaw to gain unauthorized access or disrupt services.

To mitigate CVE-2026-30282, organizations should immediately monitor for updates or patches from UXGROUP LLC and apply them as soon as they become available. In the interim, restrict the file import functionality to trusted users and networks, and implement strict input validation to prevent path traversal and unauthorized file overwrites. Employ application whitelisting and sandboxing to limit the impact of potential code execution. Regularly audit file system permissions to ensure the application cannot overwrite critical system files. Network segmentation can reduce exposure by isolating vulnerable systems. Additionally, educate users about the risks of interacting with untrusted files or prompts within the application. Implementing endpoint detection and response (EDR) solutions can help identify suspicious activities related to file manipulation or code execution attempts. Finally, maintain comprehensive backups to enable recovery in case of successful exploitation.