CVE-2026-29126: Incorrect permission assignment (world-writable file) in /etc/udhcpc/default.script in International Data Cast

Routine

HIGH 7.8MITIGATE

CVE-2026-29126 is a high-severity flaw (CVSS 7.8) affecting sfx2100 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect permission assignment (world-writable file) in /etc/udhcpc/default.script in International Data Casting (IDC) SFX2100 Satellite Receiver allows a local unprivileged attacker to potentially execute arbitrary commands with root privileges (local privilege escalation and persistence) via modification of a root-owned, world-writable BusyBox udhcpc DHCP event script, which is executed when a DHCP lease is obtained, renewed, or lost.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-732, CWE-863
Published	2026-03-05
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

2026-03-05 02:16 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.

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-2026-29126?

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

Is CVE-2026-29126 being exploited?

CVE-2026-29126 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-2026-29126 affect?

CVE-2026-29126 affects sfx2100 firmware. Severity is high (CVSS 7.8). Incorrect permission assignment (world-writable file) in /etc/udhcpc/default.script in International Data Casting (IDC) SFX2100 Satellite Receiver allows a local unprivileged attacker to potentially execute arbitrary commands with root priv

How urgent is CVE-2026-29126?

Priority 33/100. High severity; Public exploit reference

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-2026-29125 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
CVE-2026-29123 HIGH 7.8 MITIGATE A SUID root-owned binary in /home/xd/terminal/XDTerminal in International Data Casting (IDC) SFX2100 on Linux

References

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