How to Fix CVE-2026-28778: IDC SFX2100 SuperFlex Satellite Receiver (Bundle Sibling)

By Sai Kiran Pandrala. Last verified: 2026-05-25.

CVE-2026-28778 is a sibling vulnerability in the same vendor advisory as CVE-2026-28769. Apply the same patched build and you close both. The technical detail below is what differs.

What's different about CVE-2026-28778?

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.

How to fix CVE-2026-28778

Apply the patched build per the primary write-up: How to Fix CVE-2026-28769. All commands, verification steps, and rollback notes for IDC SFX2100 SuperFlex Satellite Receiver are listed there.

Frequently asked questions

Does the CVE-2026-28769 patch close CVE-2026-28778?

Yes. Both CVEs are addressed by the same vendor patch. Applying the patched build closes the full bundle.

Is CVE-2026-28778 listed in CISA KEV?

No public KEV listing at the time of this writing.

Where is the official advisory?

See https://www.abdulmhsblog.com/posts/sfx2100-vulns/

References

• Official vendor advisory: https://www.abdulmhsblog.com/posts/sfx2100-vulns/
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-28778
• CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• Primary: How to Fix CVE-2026-28769

*Written by Sai Kiran Pandrala. Part of the IDC SFX2100 SuperFlex Satellite Receiver bundle. Full procedure at how-to-fix-cve-2026-28769.*