A federal appeals panel appeared poised to overturn the dismissal of a closely watched pair of cases brought over data breaches that hit the U.S. Office of Personnel Management.

The breaches compromised the Social Security numbers and other personal information of 21 million federal government employees, and prospective employees, at OPM. In 2017, U.S. District Judge Amy Berman Jackson dismissed two cases brought over the breaches, one by a government employee union and one a class action, after concluding that the plaintiffs lacked standing to sue because they hadn’t been injured.