Affected Products:
Single-Function: CS720, CS725, CS727, CS728, C4150, CS820, CS827 and C6160
Multifunction: CX725, CX727, XC4140, XC4143, XC4150, XC4153, CX820, CX825, CX827, CX860, XC6152, XC6153, XC8155, XC8160 and XC8163

Issue Description:
Hosts not entered into the restricted server list (RSL) are still able to print and access the Embedded Web Server (EWS) regardless of the RSL options selected.

Solution:
Update firmware to version xx.031.094 or greater. To obtain this PE-released version of firmware, please contact Lexmark Technical Support and reference this article ID# SO8241.
Note:
xx - denotes CA, PP, YK, or ATL and is based on your printer model.

Still Need Help?
Have the following available when calling Lexmark Technical Support;
Printer model(s)
Printer serial number
LEGACY ID: SO8241