An Egyptian banking source told the Anadolu Agency that the CBE had ordered all banks working in the country to deny 21 Islamist figures access to their financial assets.
"This applies to selling, mortgaging or giving away structural assets," the source said.
The move follows a decision by Egypt's prosecutor-general on Monday to temporarily block the assets of 21 leading Islamist figures pending investigation into charges of inciting violence.
The freeze affects Muslim Brotherhood leader Mohammad Badie, deputies Khairat Al-Shater, Rashad Bayoumi and Mahmoud Ezzat, and former group leader Mohammad Mahdi Akef.
The list also includes FJP leader Saad Katatni, his deputy Essam Al-Erian, senior group member Mohamed El-Beltagi, along with other leading Islamist figures.
Egypt has been in a state of political turmoil since the military's removal of elected President Mohammad Morsi on July 3 following mass protests demanding snap presidential polls.
The Egyptian Armed Forces subsequently suspended the new constitution, approved late last year via popular referendum, and installed the head of the country's High Constitutional Court as interim president.
Thousands of Morsi's supporters have since hit the streets nationwide to defend Morsi's democratic legitimacy and demand his reinstatement.