There is one technique you can do easily in After Effects if you have it, and that would be to create an adjustment layer, then use the ellipse tool and make a circle around the womans face. Then use the brightness and curves to lighten, be sure to feather slightly. If she’s moving you’d have to keyframe the position points.
You might be able to do something similar to this in Premeire pro by duplicating the clip, create new title, use ellipse tool around face, set to “Track Matte” effect on video, then in that effect direct it to the proper footage and adjust.
The simple truth though is that if the face is too dark with not enough data then theres really not much you can do.