CVE-2026-28776: International Datacasting Corporation (IDC) SFX Series SuperFlex SatelliteReceiver contains hardcoded credenti

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2026-28776 is a critical-severity flaw (CVSS 9.8) affecting sfx2100 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

International Datacasting Corporation (IDC) SFX Series SuperFlex SatelliteReceiver contains hardcoded credentials for the `monitor` account. A remote unauthenticated attacker can use these trivial, undocumented credentials to access the system via SSH. While initially dropped into a restricted shell, the attacker can trivially break out to achieve standard shell functionality.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-798
Published	2026-03-04
Last modified	2026-06-17

Publisher (CNA): Gridware · Vendor: datacast

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-04 08:16 UTCPublished CVE record published
2026-06-17 10:29 UTCUpdated Record last modified

datacast sfx2100 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora ELN · openldap · FIXED · 2.6.16-1.eln159 · FEDORA-2026-4b30c86326 · source

sudo dnf upgrade --advisory=FEDORA-2026-4b30c86326

Fedora 46 · php-pecl-yac · FIXED · 3.0.1-2.fc46 · FEDORA-2026-5f43289aa2 · source

sudo dnf upgrade --advisory=FEDORA-2026-5f43289aa2

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-28776?

sfx2100 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-28776 being exploited?

CVE-2026-28776 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-28776 affect?

CVE-2026-28776 affects sfx2100 firmware. Severity is critical (CVSS 9.8). International Datacasting Corporation (IDC) SFX Series SuperFlex SatelliteReceiver contains hardcoded credentials for the `monitor` account. A remote unauthenticated attacker can use these trivial, undocumented credentials to access the sys

How urgent is CVE-2026-28776?

Priority 55/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-29128 CRITICAL 10.0 MITIGATE IDC SFX2100 Satellite Receiver firmware ships with multiple daemon configuration files for routing components
CVE-2026-29127 HIGH 7.8 MITIGATE The IDC SFX2100 Satellite Receiver sets overly permissive file system permissions on the monitor user's home d
CVE-2026-29126 HIGH 7.8 MITIGATE Incorrect permission assignment (world-writable file) in /etc/udhcpc/default.script in International Data Cast
CVE-2026-29125 MEDIUM 4.7 MITIGATE IDC SFX2100 Satalite Recievers set the `/etc/resolv.conf` file to be world-writable by any local user, allowin
CVE-2026-29124 HIGH 7.8 MITIGATE Multiple SUID root-owned binaries are found in /home/monitor/terminal, /home/monitor/kore-terminal, /home/moni

References

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