In
accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the
Undersigned Shareholders hereby agree to the joint filing on behalf of each of them of a
statement on Schedule 13D (including amendments thereto) with respect to the Common Stock,
par value $10.00 per share, of CNB Corporation and that this Agreement be included as an
Exhibit to such joint filing. This Agreement may be executed in any number of counterparts
all of which taken together shall constitute one and the same instrument.
IN
WITNESS WHEREOF, the Undersigned Shareholders hereby execute this Agreement this 6th day
of September 2005.