LOYTEC L-IP BACnet/IP Routers Cross-site Scripting (CVE-2026-12496)

info Tenable OT Security Plugin ID 505943

Description

An unauthenticated remote attacker can inject and store malicious JavaScript in the OPC XML-DA server statistics page (/webui/statistics/opc_srv) of a LOYTEC L-IP BACnet/IP router by sending a crafted 'User-Agent' header in a POST request to the device's '/da' endpoint. The script executes in an administrator's browser when the statistics page is later viewed, enabling session hijacking, credential theft, or device reconfiguration.

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Plugin Details

Severity: Info

ID: 505943

Published: 9/7/2026

Updated: 9/7/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.65

Reference Information

CVE: CVE-2026-12496