Letter Amendment to that certain Second Amended and Restated Master Services Agreement between Qwest Corporation and Synacor, Inc. dated June 1, 2017

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And copy to:

Synacor, Inc.

Attn: Synacor Legal Department 40 La Riviere Drive, Suite 300

Buffalo, New York 14202.t.J.J

Termination Date: May 28, 2018

Dear Mr. Starbird:

This letter serves as notice of termination of the Internet Security F-Secure Premium Product effective as of the Termination Date, pursuant to Section l(a)(iv} of Schedule D.

Please provide all work product, return or destroy all Centurylink confidential information related to the F• Secure Premium Product, and continue to support Centurylink customers with this product through the Termination Date. No further payments will be made by Centurylink for this product after the Termination Dale.