Lantronix SLC8000 before firmware v9.7.0.3, SLC9000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882 contain a server-side request forgery vulnerability in the WebSSH/WebTelnet listener that allows unauthenticated attackers to cause the affected device to establish Telnet connections to attacker-controlled endpoints. The custom shellinaboxd uses the rooturl parameter from the web connection to determine its own IP address; by modifying this parameter an attacker redirects the Telnet terminal connection to an arbitrary host or IP. Attackers can use this capability to enumerate or communicate with internal network endpoints that would otherwise be inaccessible.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
lantronix:emg8500
lantronix:emg7500
lantronix:slc8000
lantronix:slc9000
lantronix:slb882
References 6
https://revrb.net/2026/09/21/revrb-lantern.html
disclosure@vulncheck.com
https://ts.lantronix.com/ftp/emg/EMG_7500/9.7.0.1R2/
disclosure@vulncheck.com
https://ts.lantronix.com/ftp/emg/EMG_8500/9.7.0.1R2/
disclosure@vulncheck.com
https://ts.lantronix.com/ftp/slc8000/9.7.0.3R3/
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-w…
disclosure@vulncheck.com
https://ts.lantronix.com/ftp/SLC9000/9.7.0.2R1/
disclosure@vulncheck.com