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CVE-2026-20761 is a command injection vulnerability affecting EnOcean SmartServer IoT version 4.60.009 and earlier. The flaw is in the handling of crafted LON/IP-852 management messages, specifically in the LtSetTimeZone function within libLonStack.so. According to the provided content, attacker-controlled timezone data from a proprietary PKTTYPE_ECHCONFIG (0xF3) message is incorporated into a shell command equivalent to timedatectl set-timezone '<timezone>' and passed to system() without proper neutralization. Claroty reported the issue is reachable pre-authentication over UDP IP-852 services, and that an attacker can first obtain configuration server details via PKTTYPE_REQDEVCONFIG (0x63) / PKTTYPE_DEVCONFIG (0x71), then craft an extended CNIP header so the device treats the malicious packet as trusted. Successful exploitation results in arbitrary OS command execution on the Linux-based controller, reportedly with root privileges.
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Pre-auth remote code execution vulnerability in EnOcean SmartServer IoT caused by command injection in IP-852 message handling, allowing arbitrary OS command execution as root.
A remote code execution vulnerability affecting EnOcean SmartServer and outdated i.LON devices caused by improper validation of packet input, enabling attackers to control arguments passed to a built-in system call and achieve root-level arbitrary code execution.
A pre-auth remote code execution vulnerability in EnOcean SmartServer IoT and legacy i.LON devices caused by improper validation of a timezone value in crafted IP-852/Echelon configuration packets, allowing arbitrary command execution as root.
A vulnerability in EnOcean SmartServer IoT (<= 4.60.009) where specially crafted LON IP-852 management messages can lead to arbitrary OS command execution.
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Cross-references every affected SKU, including bundled OEM variants.
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