Allah says in the Qur’an
And "O Adam, dwell, you and your wife, in Paradise and eat from wherever you will but do not approach this tree, lest you be among the wrongdoers." Then Shaitan (Satan) whispered suggestions to them both in order to uncover that which was hidden from them of their private parts (before); He said, "Your Lord did not forbid you this tree except that you become angels or become of the immortal." And he swore [by Allah ] to them, "Indeed, I am to you from among the sincere advisors." So he made them fall, through deception. And when they tasted of the tree, their private parts became apparent to them, and they began to fasten together over themselves from the leaves of Paradise. And their Lord called to them, "Did I not forbid you from that tree and tell you that Satan is to you a clear enemy?" DUA: They said, "Our Lord, we have wronged ourselves, and if You do not forgive us and have mercy upon us, we will surely be among the losers." [ Allah ] said, "Descend, being to one another enemies. And for you on the earth is a place of settlement and enjoyment for a time."Quran Surah Araf 7:19-24
Here, the Glorious Qur’an clearly shows that both Adam and Eve were deceived, and that they both together ate from the tree, not Eve alone being deceived and then deceiving Adam to join in her sin. Satan went to themboth and deceived them both into eating from the tree, and they were both equally guilty. Hence, Both Adam and Eve are equally guilty.
Islam in no way indicates that Eve was the weaker of the two, or that she tempted Adam to disobey God. Eating the fruit of the tree was a mistake committed by both Adam and Eve. They bear equal responsibility and are equally guilty.
It is neither Eve nor Adam responsible for sin but it was Satan. Satan was there in the Paradise of Adam and Eve and his vow was to misguide and deceive them and their descendents. Satan said: “…surely I will sit in wait against them (human beings) on Your Straight Path. Then I will come to them from before them and behind them, from their right and from their left…” (Quran Surah araf 7:16-17) Satan is arrogant, and considered himself better then Adam, and thus mankind. He is crafty and cunning, but ultimately understands the weakness of human beings; he recognises their loves and desires.