The alarming jump in numbers came just hours after Chancellor Angela Merkel met with the leaders of Germany's 16 federal states to agree tougher restrictions designed to slow the spread of the contagion.
The highest number of new cases previously recorded in one day was 6,294, on March 28th, according to figures from the Robert Koch Institute (RKI) disease control centre.
On Wednesday last week, RKI reported 4,059 of new infections. This was the first time since April that the 4,000 mark had been exceeded.
The number of coronavirus tests has fluctuated between around 1.1 million and 1.2 million per week since mid-August.
However, according to RKI data from Wednesday evening, the rate of positive tests has increased significantly: from 0.74 percent at the end of August to 2.48 percent in the week from October 5th to 11th.
Chancellor Angela Merkel on Wednesday night announced new limits on people gathering at events as well as mandatory mask wearing in crowded places.
Under the new measures, if an area records more than 35 new infections per 100,000 people over seven days, masks will become mandatory in all places where people have close contact.
“We can see that … infection rates are rising and that we have a very high infection rate in some regions,” Merkel said.
“We must therefore prevent an uncontrolled or exponential increase.”
The number of people allowed to gather will also be limited to 25 in public and 15 in private spaces.
Once a threshold of 50 new infections per 100,000 is exceeded, even tougher restrictions will apply.
These include limiting private gatherings to 10 people or two households, and the closure of restaurants after 11:00 pm.
Even more curbs could be imposed if the upwards trajectory of new infections is maintained, Merkel warned.
“We will see if what we've done today is enough,” she said after Wednesday's decisions.