CVE-2026-28773
Published: 04 March 2026
Summary
CVE-2026-28773 is a high-severity OS Command Injection (CWE-78) vulnerability in Datacast Sfx2100 Firmware. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 26.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 CM-7 (Least Functionality) and SI-10 (Information Input Validation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly requires validation of the IPaddr parameter to reject malformed inputs with shell metacharacters like pipe |, preventing OS command injection.
Mandates timely identification, reporting, and remediation of flaws such as the insecure parsing in /IDC_Ping/main.cgi, eliminating the vulnerability through patching.
Enforces least functionality by prohibiting or restricting unnecessary diagnostic utilities like the vulnerable Ping tool, blocking the attack vector entirely.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE enables OS command injection via web CGI parameter (T1190: Exploit Public-Facing Application), allowing arbitrary Unix shell command execution (T1059.004) with privilege escalation to root (T1068).
NVD Description
The web-based Ping diagnostic utility (/IDC_Ping/main.cgi) in International Datacasting Corporation (IDC) SFX Series SuperFlex Satellite Receiver Web Management Interface version 101 is vulnerable to OS Command Injection. The application insecurely parses the `IPaddr` parameter. An authenticated attacker can bypass server-side…
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semicolon exclusion checks by using alternate shell metacharacters (such as the pipe `|` operator) to append and execute arbitrary shell commands with root privileges.
Deeper analysisAI
CVE-2026-28773 is an OS Command Injection vulnerability (CWE-78) affecting the web-based Ping diagnostic utility at /IDC_Ping/main.cgi in the International Datacasting Corporation (IDC) SFX Series SuperFlex Satellite Receiver Web Management Interface version 101. The issue arises from insecure parsing of the IPaddr parameter, with a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Published on 2026-03-04, it allows attackers to bypass server-side semicolon exclusion checks.
An authenticated attacker with low privileges (PR:L) can exploit this vulnerability remotely over the network (AV:N) with low attack complexity (AC:L) and no user interaction required. By using alternate shell metacharacters, such as the pipe (|) operator, the attacker can append and execute arbitrary shell commands with root privileges, potentially compromising confidentiality, integrity, and availability at a high level.
Advisories and mitigation details are available in the referenced blog post at https://www.abdulmhsblog.com/posts/sfx2100-vulns/.
Details
- CWE(s)