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                         NOTICE OF GUARANTEED DELIVERY
                                 IN RESPECT OF
                          7.15% SENIOR NOTES DUE 2005
                                       OF
 
                                CBS CORPORATION
               PURSUANT TO THE PROSPECTUS DATED           , 1998
 
       THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M.,
NEW YORK CITY TIME, ON          , 1998, UNLESS EXTENDED ("THE EXPIRATION DATE").
 
     As set forth in the Prospectus dated           , 1998 (as it may be
supplemented and amended from time to time, the "Prospectus") of CBS Corporation
(the "Company") under "The Exchange Offer -- Guaranteed Delivery Procedures,"
and in the Instructions to the related Letter of Transmittal (the "Letter of
Transmittal"), this form, or one substantially equivalent hereto, or an Agent's
Message relating to the guaranteed delivery procedures, must be used to accept
the Company's offer (the "Exchange Offer") to exchange any and all of its
outstanding 7.15% Senior Notes due 2005 (the "Notes"), for new 7.15% Senior
Notes due 2005 (the "Exchange Notes") if time will not permit the Letter of
Transmittal, certificates representing such Notes and other required documents
to reach the Exchange Agent, or the procedures for book-entry transfer cannot be
completed, on or prior to the Expiration Date (as defined).
 
     This form must be delivered by an Eligible Institution (as defined herein)
by mail or hand delivery or transmitted via facsimile to the Exchange Agent as
set forth above. If a signature on the Letter of Transmittal is required to be
guaranteed by a Medallion Signature Guarantor under the instructions thereto,
such signature guarantee must appear in the applicable space provided in the
Letter of Transmittal. This form is not to be used to guarantee signatures.
 
     Questions and requests for assistance and requests for additional copies of
the Prospectus may be directed to the Exchange Agent at the address above.
Holders may also contact their broker, dealer, commercial bank, trust company,
or other nominee for assistance concerning the Exchange Offer.
 
                 THE EXCHANGE AGENT FOR THE EXCHANGE OFFER IS:
 
                                 CITIBANK, N.A.
 

                                                                               
                 By Mail:                           By Overnight Delivery:                        By Hand:
              Citibank, N.A.                            Citibank, N.A.                         Citibank, N.A.
  c/o Citicorp Data Distributions, Inc.      c/o Citicorp Data Distributions, Inc.         Corporate Trust Window
              P.O. Box 7072                             404 Sette Drive                  111 Wall Street, 5th Floor
        Paramus, New Jersey 07653                  Paramus, New Jersey 07652              New York, New York 10043
 
                                             Facsimile for Eligible Institutions:
                                                        (201) 262-3240
                                                 Facsimile Confirmation Only:
                                                        (800) 422-2077
                                                       For Information:
                                                        (800) 422-2077

 
     DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS, OR
TRANSMISSION VIA FACSIMILE TO A NUMBER, OTHER THAN AS SET FORTH ABOVE WILL NOT
CONSTITUTE VALID DELIVERY.
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Ladies and Gentlemen:
 
     The undersigned hereby tender(s) to the Company, upon the terms and subject
to the conditions set forth in the Prospectus and the related Letter of
Transmittal (receipt of which is hereby acknowledged), the principal amount of
the Notes specified below pursuant to the guaranteed delivery procedures set
forth in the Prospectus under "The Exchange Offer -- Guaranteed Delivery
Procedures" and in Instruction 2 to the Letter of Transmittal. The undersigned
hereby authorizes the Exchange Agent to deliver this Notice of Guaranteed
Delivery to the Company with respect to the Notes tendered pursuant to the
Exchange Offer.
 
     The undersigned understands that Notes will be exchanged only after timely
receipt by the Exchange Agent of (i) such Notes, or a Book-Entry Confirmation,
and (ii) a Letter of Transmittal (or a manually signed facsimile thereof),
including by means of an Agent's Message, of the transfer of such Notes into the
Exchange Agent's account at the Book-Entry Transfer Facility, with respect to
such Notes, properly completed and duly executed, with any signature guarantees
and any other documents required by the Letter of Transmittal within three New
York Stock Exchange, Inc. trading days after the execution hereof. The
undersigned also understands that the method of delivery of this Notice of
Guaranteed Delivery and any other required documents to the Exchange Agent is at
the election and sole risk of the holder, and the delivery will be deemed made
only when actually received by the Exchange Agent.
 
     The undersigned understands that tenders of Notes will be accepted only in
principal amounts equal to $1,000 or integral multiples thereof. The undersigned
also understands that tenders of Notes may be withdrawn at any time prior to the
Expiration Date.
 
     All authority conferred or agreed to be conferred by this Notice of
Guaranteed Delivery shall not be affected by, and shall survive, the death or
incapacity of the undersigned, and every obligation of the undersigned under
this Notice of Guaranteed Delivery shall be binding upon the heirs, executors,
administrators, trustees in bankruptcy, personal and legal representatives,
successors and assigns of the undersigned.
 
     All capitalized terms used herein but not defined herein shall have the
meanings ascribed to them in the Prospectus.
 
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                            PLEASE SIGN AND COMPLETE
 
Principal Amount of Notes Tendered:
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Name(s) of Registered Holder(s):
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- --------------------------------------------------------------------------------
 
Certificate No.(s) of Notes (if available):
                  --------------------------------------------------------------
 
Address:
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- --------------------------------------------------------------------------------
 
Area Code and Telephone No.:
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If Notes will be delivered by book-entry transfer, provide the following
information:
 
Signature(s) of Registered Holder(s)
or Authorized Signatory:
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
DTC Account No.:
- --------------------------------------------------------------------------------
 
Date:
- --------------------------------------------------------------------------------
 
THIS NOTICE OF GUARANTEED DELIVERY MUST BE SIGNED BY THE HOLDER(S) EXACTLY AS
THEIR NAME(S) APPEAR(S) ON CERTIFICATE(S) FOR NOTES OR ON A SECURITY POSITION
LISTING AS THE OWNER OF NOTES, OR BY PERSON(S) AUTHORIZED TO BECOME HOLDER(S) BY
ENDORSEMENTS AND DOCUMENTS TRANSMITTED WITH THIS NOTICE OF GUARANTEED DELIVERY
WITHOUT ALTERATION, ENLARGEMENT OR ANY CHANGE WHATSOEVER. IF SIGNATURE IS BY A
TRUSTEE, EXECUTOR, ADMINISTRATOR, GUARDIAN, ATTORNEY-IN-FACT, OFFICER OR OTHER
PERSON ACTING IN A FIDUCIARY OR REPRESENTATIVE CAPACITY, SUCH PERSON MUST
PROVIDE THE FOLLOWING INFORMATION.
 
                      Please print name(s) and address(es)
 
Name(s):
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
Capacity:
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Address(es):
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
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                                   GUARANTEE
                    (NOT TO BE USED FOR SIGNATURE GUARANTEE)
 
     The undersigned, a member of the Securities Transfer Agents Medallion
Program, the Stock Exchange Medallion Program or the New York Stock Exchange,
Inc. Medallion Signature Program (each, an "Eligible Institution"), hereby (i)
represents that the above-named persons are deemed to own the Notes tendered
hereby within the meaning of Rule 14e-4 promulgated under the Securities
Exchange Act of 1934, as amended ("Rule 14e-4"), (ii) represents that such
tender of Notes complies with Rule 14e-4 and (iii) guarantees that the Notes
tendered hereby are in proper form for transfer (pursuant to the procedures set
forth in the Prospectus under "The Exchange Offer -- Guaranteed Delivery
Procedures"), and that the Exchange Agent will receive (a) such Notes, or a
Book-Entry Confirmation of the transfer of such Notes into the Exchange Agent's
account at the Book-Entry Transfer Facility and (b) a properly completed and
duly executed Letter of Transmittal or facsimile thereof (or Agent's message)
with any required signature guarantees and any other documents required by the
Letter of Transmittal within three New York Stock Exchange, Inc. trading days
after the date of execution hereof.
 
     The Eligible Institution that completes this form must communicate the
guarantee to the Exchange Agent and must deliver the Letter of Transmittal and
Notes to the Exchange Agent within the time period shown herein. Failure to do
so could result in a financial loss to such Eligible Institution.
 
Name of Firm:
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Authorized Signature:
- --------------------------------------------------------------------------------
 
Title:
- --------------------------------------------------------------------------------
 
Address:
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
                                                       (Zip Code)
 
Area Code and Telephone Number:
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Dated:
- ------------------------------------ , 1998
 
DO NOT SEND NOTES WITH THIS FORM. NOTES SHOULD BE SENT TO THE EXCHANGE AGENT
TOGETHER WITH A PROPERLY COMPLETED AND DULY EXECUTED LETTER OF TRANSMITTAL.
 
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