CVE-2026-29120 is a critical security vulnerability identified in the International Datacasting Corporation (IDC) SFX2100 SuperFlex Satellite Receiver. The root cause is the insecure storage of a hardcoded root password hash within the /root/anaconda-ks.cfg installation configuration file. This password hash corresponds to a weak password that is highly susceptible to offline dictionary attacks, notably using widely available wordlists such as rockyou.txt. Although direct root SSH login is disabled by default, an attacker who first obtains low-privileged access to the system—potentially through other vulnerabilities or misconfigurations—can leverage this hardcoded credential to escalate privileges to root. The vulnerability is classified under CWE-798 (Use of Hard-coded Credentials), which is a common and dangerous security flaw because it undermines authentication mechanisms and facilitates unauthorized access. The CVSS v4.0 score of 9.2 (critical) reflects the high impact on confidentiality, integrity, and availability, combined with relatively low attack complexity once local access is achieved. The scope is high as the vulnerability affects the entire device, and no user interaction is required. Currently, no public patches or known exploits in the wild have been reported, but the presence of hardcoded credentials in critical satellite communication equipment poses a significant security risk. This vulnerability could allow attackers to fully control the satellite receiver, potentially disrupting broadcast services or enabling further network infiltration.

The impact of CVE-2026-29120 is severe for organizations relying on IDC SFX2100 SuperFlex Satellite Receivers, particularly those in satellite broadcasting, telecommunications, and defense sectors. An attacker who gains low-privileged access can escalate to root, gaining full control over the device. This could lead to unauthorized interception, manipulation, or disruption of satellite data streams, compromising confidentiality and integrity of transmitted information. The availability of satellite communication services could also be affected, causing operational outages with potentially wide-reaching consequences. Given the critical role of satellite receivers in broadcasting and secure communications, exploitation could facilitate espionage, sabotage, or denial of service attacks. The vulnerability also increases the attack surface by enabling lateral movement within networks if the device is connected to broader infrastructure. Organizations worldwide that deploy these receivers in critical environments face heightened risk of targeted attacks, especially if other vulnerabilities or weak access controls exist that allow initial low-level access.

To mitigate CVE-2026-29120, organizations should first identify all IDC SFX2100 SuperFlex Satellite Receivers in their environment. Immediate steps include: (1) auditing the /root/anaconda-ks.cfg file to detect the presence of hardcoded password hashes; (2) changing the root password to a strong, unique value and removing any hardcoded credentials from configuration files; (3) disabling or restricting all non-essential local access methods to minimize the risk of initial low-privileged compromise; (4) implementing network segmentation to isolate satellite receivers from general IT infrastructure; (5) monitoring for unusual authentication attempts or privilege escalations on these devices; (6) applying any vendor-provided patches or firmware updates once available; and (7) employing multi-factor authentication and strict access control policies for administrative access. Additionally, organizations should conduct penetration testing to identify other vulnerabilities that could provide initial access, as exploitation requires prior low-level access. Regularly updating and hardening device configurations and maintaining an inventory of satellite communication assets are critical for ongoing security.