Employment Agreement dated as of June 1, 2017 between CBS Corporation and Lawrence P. Tu (incorporated by reference to Exhibit 10(b) to the Quarterly Report on Form 10-Q of CBS Corporation for the quarter ended September 30, 2017) (File No. 001-09553)

Reference is made to your employment agreement with CBS Corporation (“CBS”), dated as of July 1, 2016, amended as of August 4, 2017 (the “Agreement”). This letter, when fully executed below, shall amend the Agreement as follows:

1.    Paragraph 7(f)(i) of the Agreement shall be amended by deleting the reference therein to “December 31, 2017” and replacing it with “May 31, 2018.”

2.    This letter may be executed in one or more counterparts, including by facsimile, and all of the counterparts shall constitute one fully executed agreement. The signature of any party to any counterpart shall be deemed a signature to, and may be appended to, any other counterpart. Except as otherwise provided herein, the Agreement shall continue in full force and effect in accordance with its terms.

If the foregoing correctly sets forth our understanding, please sign, date, and return this letter to the undersigned for execution on behalf of CBS.