Consumer watchdog Nader wants Cisco to atone for the negative movement in its stock over the past year. Cisco is the worst-performing component on the Dow Jones Industrials this year, . Shares are down nearly 25% this year, on top of a more than 15% decline in 2010.

Cisco is using some of its hoarded cash to after long ignoring calls to do so. But Nader wants the company to ante up some more.

ANALYSIS:

In a letter to CEO John Chambers, Nader calls on the company to boost its dividend and its shares. The letter was sent privately on June 13, but .

In the letter, Nader criticizes Chambers for not doing enough to boost the company's share and suggested it might be time for a "shareholder revolt against a management that is oblivious to building or even maintaining shareholder value."