A Brooklyn woman suffered severe burns across her body when someone sneaked up on her outside her home and splashed her with a caustic substance in a disturbing incident caught on surveillance footage, cops said Monday.

The 39-year-old victim could be seen taking out the garbage just before 11 p.m. Sunday in front of her Borough Park home when an unidentified man doused her with the liquid, which police believe was an acid.

The fluid caused second-degree burns over the woman’s upper body, face and hands, officials said.

She was in stable condition at Maimonides Hospital on Monday, they said.

The assault comes as the Big Apple sees a significant downturn in crime, with a nearly 20-percent dip in major felonies over the past 28 days, compared with the same period last year, according to NYPD data released Monday.

Felony assaults were down by about 270, the report shows.

But year-to-date serious assaults were up 1.5 percent as of Sunday, despite the major effect the pandemic COVID-19 has had on city crime.