The 51-year-old reporter, who hasn't been seen on the air for weeks, reached out to the news source, sending the following statement.
"Like so many people, I am dealing with addiction. I realized I was becoming increasingly dependent on alcohol, and feel fortunate to have recognized it for the problem it was becoming. I am in treatment and am so thankful for the love and support of my family, friends and colleagues at ABC News. Like so many others, I will deal with this challenge one day at a time. If coming forward today gives one other person the courage to seek help, I'm grateful."
Vargas is expected to return to her co-anchor position after her release from treatment.
An ABC spokesperson told NY Daily News, "We are proud of the steps Elizabeth has taken and are pulling for her recovery. We look forward to having her back home at ABC News, where she has done so much distinguished work over the years. Elizabeth is a member of our family, and we will support her in every way we can."