The report is the first of its kind, charting progress in 155 countries against the "INSPIRE" framework, a set of seven strategies for preventing and responding to violence against children.
While nearly all countries (88 per cent) have key laws in place to protect children against violence, less than half of countries (47 per cent) said these were being strongly enforced.
Of the INSPIRE strategies, only access to schools through enrollment showed the most progress with 54 per cent of countries reporting that a sufficient number of children in need were being reached in this way.
"Although a majority of countries (83 per cent) have national data on violence against children, only 21 per cent used these to set baselines and national targets to prevent and respond to violence against children.
"Whilst this report was being finalised, confinement measures and the disrupted provision of already limited child protection services exacerbated the vulnerability of children to various forms of violence.