CVE-2026-124014: Dixell/Copeland XWEB EVO Unauthenticated Configuration Write via config.lua
XWEB EVO 4.3.0 through 5.8.8 contains an unauthenticated arbitrary file write vulnerability that allows remote attackers to modify the system configuration file /etc/xwebconfig.json by sending a crafted POST request to config.lua with action=set, which performs no session validation and writes the raw, unvalidated request body. Attackers can tamper with configuration values such as model and plugin fields or trigger a SYSTEMNOTCONFIGURED state via the unauthenticated action=get and action=set operations, resulting in configuration tampering and denial of service. This product line reached it's end of service date in March 2026.
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
XWEB EVO versions 4.3.0 through 5.8.8 are affected. Exposure exists where an attacker can reach the device's config.lua endpoint over the network.
Does exploitation require authentication or user interaction?
No. The affected config.lua actions perform no session validation, so a remote attacker can send crafted POST requests without credentials or user interaction.
What can an attacker change?
An attacker can write unvalidated request data to /etc/xwebconfig.json and tamper with configuration values including model and plugin fields. The action=get and action=set operations can also be used to place the system into a SYSTEM_NOT_CONFIGURED state, causing denial of service.
What should operators consider if they cannot immediately remediate?
Restrict network access to the affected XWEB EVO interface so untrusted remote systems cannot reach config.lua. The product line reached end of service in March 2026, so operators should account for the lack of ongoing support when planning mitigation or replacement.