CVE-2026-28770 is an XML Injection vulnerability classified under CWE-91, found in the International Datacasting Corporation (IDC) SFX Series SuperFlex Satellite Receiver Web management interface, specifically version 101. The vulnerability arises from improper neutralization of special elements in the /IDC_Logging/checkifdone.cgi script. The 'file' parameter accepts user input that is directly embedded into a CDATA section of an XML document without adequate sanitization. This allows an authenticated attacker to break out of the CDATA context and inject arbitrary XML elements. Such injection can be leveraged to perform reflected cross-site scripting (XSS) attacks, which can compromise user sessions or execute malicious scripts in the context of the management interface. Furthermore, the injection vector may enable more advanced attacks such as XML External Entity (XXE) processing, potentially allowing attackers to read local files, perform server-side request forgery (SSRF), or cause denial of service. The vulnerability is remotely exploitable over the network, requires low privileges (authenticated access), and does not require user interaction. The CVSS 4.0 base score is 5.3, reflecting a medium severity level due to the combination of network attack vector, low complexity, and limited privileges required. No public exploits have been reported yet, but the nature of the vulnerability suggests that exploitation could lead to significant compromise of the satellite receiver’s management functions.

The primary impact of CVE-2026-28770 is the potential compromise of confidentiality, integrity, and availability of the satellite receiver's management interface. Successful exploitation could allow attackers to execute reflected XSS attacks, leading to session hijacking, credential theft, or unauthorized command execution within the management console. If XXE exploitation is achieved, attackers could access sensitive internal files, perform SSRF attacks, or disrupt device operations, potentially affecting satellite broadcast management and data distribution. Given the critical role of IDC's SFX Series receivers in satellite communications infrastructure, such compromises could disrupt broadcast services, leak sensitive operational data, or enable further lateral movement within organizational networks. The requirement for authentication limits exposure but does not eliminate risk, especially in environments with weak credential management or insider threats. Organizations relying on these devices for critical communications may face operational disruptions and reputational damage if exploited.

To mitigate CVE-2026-28770, organizations should implement strict input validation and sanitization on the 'file' parameter within the /IDC_Logging/checkifdone.cgi script to ensure special XML characters cannot break out of CDATA sections. Employing a whitelist approach for allowed characters or encoding user input before embedding it into XML is recommended. Network segmentation and access controls should restrict management interface access to trusted administrators only. Multi-factor authentication (MFA) should be enforced to reduce the risk posed by compromised credentials. Monitoring and logging of management interface access can help detect suspicious activity. Until an official patch is released by IDC, consider deploying web application firewalls (WAFs) with custom rules to detect and block XML injection patterns targeting this endpoint. Regularly audit and update credentials and review user privileges to minimize the attack surface. Finally, maintain awareness of vendor advisories for any forthcoming patches or updates addressing this vulnerability.