CVE-2026-28773 is an OS Command Injection vulnerability classified under CWE-78 affecting the International Datacasting Corporation (IDC) SFX Series SuperFlex Satellite Receiver Web Management Interface version 101. The vulnerability exists in the web-based Ping diagnostic utility located at /IDC_Ping/main.cgi, specifically in the handling of the IPaddr parameter. The application attempts to prevent command injection by excluding semicolons, but this check is insufficient because attackers can use alternate shell metacharacters such as the pipe (|) operator to chain additional commands. An authenticated attacker can exploit this flaw to execute arbitrary shell commands with root privileges on the underlying operating system. This level of privilege escalation can lead to full system compromise, including data theft, service disruption, or pivoting to other networked systems. The vulnerability does not require user interaction and can be exploited remotely over the network. The CVSS 4.0 base score of 9.3 reflects the vulnerability's critical nature, with network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, and availability. Although no known exploits are publicly reported yet, the risk is significant due to the root-level command execution capability. The affected product is specialized satellite receiver management software used in broadcast and communication sectors, making it a high-value target for attackers aiming to disrupt satellite communications or gain intelligence.

The impact of CVE-2026-28773 is severe for organizations using the IDC SFX Series SuperFlex Satellite Receiver Web Management Interface. Successful exploitation grants attackers root-level command execution, enabling full system compromise. This can lead to unauthorized access to sensitive satellite communication data, disruption of satellite broadcast services, and potential manipulation or destruction of critical infrastructure reliant on satellite connectivity. The breach could facilitate lateral movement within an organization's network, data exfiltration, installation of persistent malware, or denial of service conditions. Given the specialized nature of the affected product, sectors such as telecommunications, broadcasting, defense, and government agencies that depend on satellite receivers for communication and data transmission are particularly vulnerable. The vulnerability's remote exploitability and lack of user interaction requirements increase the likelihood of targeted attacks. The absence of known public exploits currently provides a limited window for remediation before potential exploitation attempts emerge.

To mitigate CVE-2026-28773, organizations should immediately apply any available patches or updates from International Datacasting Corporation once released. In the absence of official patches, implement strict input validation and sanitization on the IPaddr parameter to disallow all shell metacharacters, not just semicolons. Employ application-layer firewalls or web application firewalls (WAFs) configured to detect and block suspicious command injection patterns, including pipe characters and other shell operators. Restrict access to the web management interface to trusted networks and enforce strong authentication mechanisms to limit attacker access. Consider isolating the management interface on a separate network segment with strict access controls. Monitor logs for unusual command execution patterns or spikes in Ping utility usage. Conduct regular security audits and penetration testing focused on command injection vectors. Additionally, implement least privilege principles on the underlying OS to limit the impact of any command execution, and consider using containerization or sandboxing techniques to isolate the web management interface processes.