Magicinfo — CraftedSignal Threat Feedhttps://feed.craftedsignal.io/tags/magicinfo/Trending threats, MITRE ATT&CK coverage, and detection metadata — refreshed continuously.Hugoenhello@craftedsignal.iohello@craftedsignal.ioFri, 10 Apr 2026 02:16:02 +0000Samsung MagicINFO 9 Server Local Privilege Escalation via Incorrect Default Permissions (CVE-2026-25203)https://feed.craftedsignal.io/briefs/2026-04-magicinfo-lpe/Fri, 10 Apr 2026 02:16:02 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-04-magicinfo-lpe/Samsung MagicINFO 9 Server versions prior to 21.1091.1 are susceptible to a local privilege escalation vulnerability due to incorrect default permissions, potentially allowing a low-privilege user to gain elevated privileges on the system.CVE-2026-25203 describes a local privilege escalation vulnerability affecting Samsung MagicINFO 9 Server versions prior to 21.1091.1. The vulnerability stems from incorrect default permissions, which could allow a malicious actor with low-level access to elevate their privileges on the system. This could lead to unauthorized access to sensitive data, modification of system configurations, or even complete system compromise. The vulnerability was reported by Samsung TV & Appliance and impacts systems running the affected MagicINFO 9 Server software. Successful exploitation of this vulnerability allows an attacker to bypass security restrictions and execute arbitrary code with elevated privileges. Defenders should prioritize patching vulnerable systems to mitigate this risk.

Attack Chain

  1. Attacker gains initial low-privilege access to the target system through legitimate means or exploiting a separate vulnerability.
  2. Attacker identifies the incorrect default permissions on critical MagicINFO 9 Server files or directories.
  3. Attacker leverages these incorrect permissions to modify configuration files or replace binaries with malicious ones.
  4. Attacker restarts the MagicINFO 9 Server service, causing the modified configuration or malicious binaries to be loaded with elevated privileges.
  5. The compromised MagicINFO 9 Server service executes the attacker’s code with SYSTEM or other high-level privileges.
  6. Attacker uses the elevated privileges to install backdoors, create new privileged accounts, or exfiltrate sensitive data.
  7. Attacker gains persistent control over the system and uses it as a pivot point for further attacks within the network.

Impact

Successful exploitation of CVE-2026-25203 allows a local attacker to escalate their privileges to SYSTEM, effectively gaining complete control over the affected Samsung MagicINFO 9 Server. This could lead to data breaches, system instability, and the potential for lateral movement within the network. The number of potential victims is unknown, but any organization utilizing vulnerable versions of Samsung MagicINFO 9 Server is at risk. The targeted sectors would be those that deploy digital signage solutions using the MagicINFO platform.

Recommendation

  • Upgrade Samsung MagicINFO 9 Server to version 21.1091.1 or later to patch CVE-2026-25203.
  • Implement the provided Sigma rule to detect suspicious process creation related to MagicINFO and privilege escalation attempts.
  • Monitor file and directory permissions within the MagicINFO installation directory for unexpected changes to detect potential exploit attempts.
  • Monitor logs for unauthorized access attempts or modifications to critical system files.
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