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Sfx2100 Firmware CVE-2026-28778

CRITICAL
Use of Hard-coded Credentials (CWE-798)
2026-03-04 b7efe717-a805-47cf-8e9a-921fca0ce0ce
Authentication Bypass RCE Sfx2100 Firmware
9.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:05 vuln.today
CVE Published
Mar 04, 2026 - 08:16 nvd
CRITICAL 9.8

DescriptionCVE.org

International Datacasting Corporation (IDC) SFX Series SuperFlex Satellite Receiver contains undocumented, hardcoded/insecure credentials for the xd user account. A remote unauthenticated attacker can log in via FTP using these credentials. Because the xd user has write permissions to their home directory where root-executed binaries and symlinks (such as those invoked by xdstartstop) are stored, the attacker can overwrite these files or manipulate symlinks to achieve arbitrary code execution as the root user.

AnalysisAI

Hardcoded/insecure credentials in IDC SFX Series SuperFlex Satellite Receiver. Multiple accounts with known credentials enable complete device takeover.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Connect to FTP with hardcoded xd credentials
Exploit
Write malicious binary to xd home directory
Execution
Root executes xdstartstop script
Impact
Arbitrary code execution as root
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Vulnerability AssessmentAI

Exploitation IDC SFX Series SuperFlex Satellite Receiver with FTP service enabled and xd user account with default hardcoded credentials intact. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 9.8. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Login with known credentials to control satellite receiver.
Remediation Apply firmware update. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all affected systems and apply vendor patches immediately. …

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CVE-2026-28778 vulnerability details – vuln.today
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