United Financial Bancorp, Inc. Receives Regulatory Approval to Acquire CNB Financial Corp.

United Financial Bancorp, Inc. Receives Regulatory Approval to Acquire CNB
Financial Corp.

WEST SPRINGFIELD, Mass. and WORCESTER, Mass., Nov. 12 /PRNewswire-FirstCall/
--United Financial Bancorp, Inc. (Nasdaq: UBNK) and CNB Financial Corp. (OTC
Bulletin Board: CFNA) announced today that United Financial Bancorp has
received regulatory approval to acquire CNB Financial. The merger is
anticipated to close on or about November 30, 2009.

As a result of the elections of the CNB Financial shareholders and the
allocation and proration mechanisms set forth in the merger agreement, the
merger consideration has been allocated as follows:

-- Those CNB Financial stockholders that elected to receive United
Financial Bancorp common stock in exchange for their shares of CNB
Financial Corp. will receive 0.8257 shares of United Financial Bancorp
common stock for each of their shares of CNB Financial Corp.

-- Those CNB Financial stockholders that elected to receive cash in
exchange for their shares of CNB Financial Corp. will receive $9.11 in
cash and 0.1257 shares of United Financial Bancorp common stock for
each
of their shares of CNB Financial Corp.

-- Those CNB Financial stockholders that did not select an election
preference or submit a properly completed election form within the
required timeframe will receive 0.8257 shares of United Financial
Bancorp common stock for each of their shares of CNB Financial Corp.

United Financial Bancorp, Inc. is a publicly owned corporation and the holding
company for United Bank, a federally chartered savings bank headquartered at
95 Elm Street, West Springfield, MA 01090. United Bank provides an array of
financial products and services through its 16 branch offices located
throughout Western Massachusetts. Through its Wealth Management Group and its
partnership with NFP Securities, Inc., the Bank is able to offer access to a
wide range of investment and insurance products and services, as well as
financial, estate and retirement strategies and products. For more information
regarding the Bank's products and services and for United Financial Bancorp,
Inc. investor relations information, please visit www.bankatunited.com.

CNB Financial Corp., headquartered in Worcester, Massachusetts, is the holding
company for Commonwealth National Bank, which opened its doors in December
2001. Commonwealth National Bank was the first new bank started in the
Worcester area in more than 15 years. Recognized for its personalized service,
state-of-the art products and experienced bankers, Commonwealth National Bank
offers branches in Worcester at 33 Waldo Street, One West Boylston Street and
1393 Grafton Street, as well as at 564 Main Street in Shrewsbury, 701 Church
Street in Northbridge and 26 West Boylston Street in West Boylston,
Massachusetts. Additional information is available on the CNB Financial's
website at www.commonwealthworcester.com.

Except for the historical information contained in this press release, the
matters discussed may be deemed to be forward-looking statements, within the
meaning of the Private Securities Litigation Reform Act of 1995, that involve
risks and uncertainties, including changes in economic conditions in the
Company's market area, changes in policies by regulatory agencies,
fluctuations in interest rates, demand for loans in the Company's market area,
competition, and other risks detailed from time to time in the Company's SEC
reports. Actual strategies and results in future periods may differ materially
from those currently expected. These forward-looking statements represent the
Company's judgment as of the date of this release. The Company disclaims,
however, any intent or obligation to update these forward-looking statements.

Company Contact: Company Contact:
Richard B. Collins Charles R. Valade
President and President and
Chief Executive Officer Chief Executive Officer
United Financial Bancorp, Inc. CNB Financial Corp.
Tel: (413) 787-1700 Tel: (508) 752-4800

SOURCE United Financial Bancorp, Inc.

Richard B. Collins, President and Chief Executive Officer, United Financial
Bancorp, Inc., +1-413-787-1700, or Charles R. Valade, President and Chief
Executive Officer, CNB Financial Corp., +1-508-752-4800