Molly Henehan and Marisa Young scored three goals apiece for the Matadors (18-5), who snapped a 9-all tie with three straight goals in the fourth period.
Kiernan Davis made 12 saves for CSN, which tied a school record with its 10th straight victory.
Michaela Davies stopped five shots for the Hawks, who took a 6-4 lead into halftime.
Katie Ermakova scored three times to lead Hartwick to a 12-7 victory over Pomona Pitzer on the second day of the Loyola Marymount Invitational on Saturday.
Jemma Dendy Young and Sami Capparelli each had two goals for the Hawks, who received one apiece from Stephanie El Safty, Ricci Ferigo, Devon Boyle, Cayley Tonkin and Lara Dendy Young.
Michaela Davies stopped five shots for Hartwick, which scored the first five goals.
Ermakova followed with five goals in a 14-7 defeat of Whittier College as Hartwick closed the invitational with a 4-0 record.
Boyle scored three times and Lara and Jemma Dendy Young had two apiece for the Hawks, who jumped to a 4-0 lead. Tonkin and Kylie Traube also scored for Hartwick, which got seven saves from Davies.
Hartwick senior Lindsay Bowker completed her appearance at the NCAA Division III Diving Championships with a 20th-place finish in the 3-meter preliminaries at Indiana University.
Bowker scored 395.90 points in the 24-woman field. Maria Zarka of Kenyon won the title with 494.15 points.
Hartwick junior Julia Ready placed first out of 16 riders in the Novice Over Fences during the IHSA Regional Championships on Saturday at Saratoga Springs. Ready, who also placed second out of 10 riders in the Intermediate Flat, qualified for zone competition along with teammates Taylor Trombley and Ashley Zizzo.
Oneonta High graduate Trombley, a sophomore, won the Intermediate Flat and placed fifth in Novice Fences.
Zizzo, a senior, didn’t compete but still qualified for zones, which run April 6 in Fairfield, Conn.