In an address at the Indian Council of World Affairs here, he also said that India can play a "huge role" in enhancing security in entire South Asia while identifying terrorism and radicalisation as major challenge being faced by the region.
"Continuing instability in Afghanistan and Pakistan is not only the responsibility of these two nations. These challenges should be addressed through greater bilateral parleys," Ban said.
India has invested USD two billion in aid and reconstruction and trained scores of Afghan officers but has been careful in supply of arms and military hardware to the country.
Afghanistan has been pressing for supply of military hardware by India to enhance strengthen its security forces but India has been maintaining caution over it apprehending that such supplies may provoke Pakistan as well as armed groups in Afghanistan.