The San Jose, Calif.-based firm was also one of the most active pre-market Nasdaq stocks on share volume of 194,871.
The networking giant missed Wall Street's revenue estimate on Wednesday, weighed down by the weak tech spending that has hurt rival tech heavyweights such as IBM (IBM). Cisco also pointed to the impact of the NSA snooping controversy on its business in China.
Cisco shares plunged 10.96% to $21.36 during Thursday's session.
Over at the NYSE, Sony (SNE) shares crept up 0.16% to $18.68 amidst buzz from gamers about the Japanese electronics giant's PlayStation 4 console, which hits stores today. Sony expects to sell 5 million PlayStation 4 units by the end of its fiscal year in March.
IBM shares rose 0.16% to $182.51.
--Written by James Rogers in New York.
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