How severe is CVE-2026-28778?

CVE-2026-28778 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-28778 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28778?

CVE-2026-28778 affects Datacast Sfx2100 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28778?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-28778 have an EU (EUVD) identifier?

Yes. CVE-2026-28778 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9373.

When was CVE-2026-28778 published?

CVE-2026-28778 was published on 2026-03-04 and last updated on 2026-06-17.

CVE-2026-28778

CVE-2026-28778 is a critical-severity vulnerability in Datacast Sfx2100 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 7.9
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9373
Weakness: CWE-798
Affected product: Datacast Sfx2100 Firmware
Published: 2026-03-04
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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 severe is CVE-2026-28778?: CVE-2026-28778 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-28778 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28778?: CVE-2026-28778 affects Datacast Sfx2100 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28778?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-28778 have an EU (EUVD) identifier?: Yes. CVE-2026-28778 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9373.
When was CVE-2026-28778 published?: CVE-2026-28778 was published on 2026-03-04 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:o:datacast:sfx2100_firmware:-:*:*:*:*:*:*:*

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