She was arrested in May before departing from Cairo Airport.
The court's verdict is not final and will be appealed on 29 July.
Emad Kamal, Mazbouh's lawyer, has expressed that "with all due respect to the judiciary, this is a severe ruling".
The court reduced the penalty from 11 to 8 years in prison, further imposing a fine of EGP 10,700.
Mona's lawyer Imad Kamal said that ten years ago she underwent brain surgery, then it's hard for her to cope with anger. She said she faced verbal harassment, launching a scathing attack at the bank's employees, which then prompted the bank to file a lawsuit against her.
In June, Egypt's parliament approved a bill placing social media accounts, blogs and websites with more than 5,000 followers under the supervision of the country's top media regulatory body.
Iran says Trump 'destabilising' oil market
Domestic stocks had been drawn down to 234 million barrels at the end of April, the lowest level since November 2011. OPEC and Russian Federation and other producers last month agreed to add 1 million barrels to the market.
Trade war: US lists next $200 bn Chinese goods to face tariffs
The U.S.is now considering levying duties on a further $16 billion in Chinese goods, after a public hearing later this month. The U.S. imposed an initial round of 25% tariffs, applying to $34 billion in imports, as part of a $50 billion tariff plan.
LeBron James officially signs contract with LA Lakers
He said: "He loves to compete and is an awesome leader who is about winning and making sure that his teammates are successful". We won't know the answer to that for some time, but James himself seems to be getting the hang of this L.A. thing already.
England vs India 2018, ODI Series - Statistical Preview
That wicket and the consequent quiet, with Pandya promoted ahead of MS Dhoni and Suresh Raina, left India 44 to get in four overs. Considering the start England had, with Jos Buttler and Jason Roy racing to 94/0 inside eight overs, the pressure was on India .