SAN JOSE, Calif. - May 4, 2007 - Cisco Systems, Inc. (NASDAQ: CSCO), today announced that it is extending its previously announced tender offer for all outstanding shares of WebEx Communications, Inc. (NASDAQ: WEBX), until 12:00 Midnight, New York City time, on Monday, May 21, 2007 (which is the end of the day on May 21, 2007). The tender offer is being extended because certain foreign regulatory approvals necessary for the consummation of the tender offer are not expected to have been received by the previously scheduled expiration date of Monday, May 7, 2007. Cisco expects to complete its tender offer in the first half of the fourth quarter of Cisco's fiscal year 2007.

As announced previously, on March 27, 2007, Cisco, through its wholly-owned subsidiary Wonder Acquisition Corp., commenced a tender offer for all outstanding shares of WebEx at a price of $57.00 per share net to the seller in cash without interest, less brokerage fees and less any required withholding taxes, pursuant to the definitive merger agreement between Cisco and WebEx.

As of 3:00 p.m., New York City time, on Friday, May 4, 2007, an aggregate of approximately 35 million shares of WebEx common stock had been tendered into, and not withdrawn from, the offer.

Securities Law Disclosure

This press release is for informational purposes only and is not an offer to buy or the solicitation of an offer to sell any securities. The solicitation and the offer to buy shares of WebEx common stock will be made only pursuant to an offer to purchase and related materials that Cisco Systems, Inc. and Wonder Acquisition Corp. have filed with the SEC on Schedule TO on March 27, 2007, as amended. WebEx also has filed a solicitation/recommendation statement on Schedule 14D-9, as amended, with respect to the offer. WebEx stockholders and other investors should read these materials carefully because they contain important information, including the terms and conditions of the offer. WebEx stockholders and other investors may obtain copies of these materials without charge from the SEC through the SEC's website at www.sec.gov, from Georgeson Inc., the information agent for the offer, toll-free at (888) 264-7052 (banks and brokers call (212) 440-9800), from Cisco (with respect to documents filed by Cisco with the SEC) by going to Cisco's Investor Relations Website at http://www.cisco.com/go/investors, or from WebEx (with respect to documents filed by WebEx with the SEC) by going to WebEx's Investor Relations Website at www.WebEx.com. Stockholders and other investors are urged to read carefully those materials prior to making any decisions with respect to the offer.