CVE-2026-29127
Published: 05 March 2026
Summary
CVE-2026-29127 is a high-severity Improper Privilege Management (CWE-269) vulnerability in Datacast Sfx2100 Firmware. Its CVSS base score is 7.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique File System Permissions Weakness (T1044); ranked at the 0.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and AC-6 (Least Privilege).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Requires secure configuration settings for file system permissions, directly preventing overly permissive 0777 access to the monitor user's home directory containing privileged binaries.
Enforces least privilege principle to restrict user and process access, mitigating local privilege escalation risks from CWE-269 improper privilege management in the affected directory.
Mandates enforcement of approved access authorizations on system resources like files, addressing CWE-863 incorrect authorization due to world-readable/writable/executable permissions.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Overly permissive 0777 home directory containing privileged binaries directly matches File System Permissions Weakness (T1044) and enables local privilege escalation via exploitation of that weakness (T1068).
NVD Description
The IDC SFX2100 Satellite Receiver sets overly permissive file system permissions on the monitor user's home directory. The directory is configured with permissions 0777, granting read, write, and execute access to all local users on the system, which may cause…
more
local privilege escalation depending on conditions of the system due to the presence of highly privileged processes and binaries residing within the affected directory.
Deeper analysisAI
CVE-2026-29127 is a vulnerability in the IDC SFX2100 Satellite Receiver, where the monitor user's home directory is configured with overly permissive file system permissions of 0777. This grants read, write, and execute access to all local users on the system. The issue stems from highly privileged processes and binaries residing within the affected directory, potentially enabling local privilege escalation based on system conditions. The vulnerability has a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) and is associated with CWE-269 (Improper Privilege Management) and CWE-863 (Incorrect Authorization).
The attack requires local access and low privileges (PR:L), with low complexity and no user interaction needed. An attacker can exploit this by reading, writing, or executing files in the monitor user's home directory, potentially modifying or running privileged binaries to escalate privileges, resulting in high impacts to confidentiality, integrity, and availability.
Advisories detailing the vulnerability are available at https://www.abdulmhsblog.com/posts/sfx2100-vulns/. No specific patches or mitigations are described in the provided CVE information.
Details
- CWE(s)