Jason Puncheon grabbed a late winner as Barnet came from behind to stretch their unbeaten run to six games.
Wycombe snatched the lead when keeper Frank Fielding's long kick bounced through to John Sutton, who made no mistake from 12 yards out.
Striker Liam Hatch equalised by chesting down Adam Birchill's 77th-minute cross and volleying home.
And in the 85th minute, Puncheon seized on the loose ball to score after his first effort was blocked by Fielding.
Barnet: Harrison, Devera (O'Cearuill 72), Yakubu, Burton, Nicolau, Carew, Wright, Bishop, Puncheon, Norville (Hatch 57), Birchall.
Subs Not Used: Beckwith, Thomas, Porter.
Booked: Bishop, Puncheon, Hatch.
Goals: Hatch 77, Puncheon 86.
Wycombe: Fielding, Stockley, Johnson, McCracken, Martin (Williams 46), Torres, Holt, Oakes (Bloomfield 74), Bullock, Sutton, McGleish (Reid 73).
Subs Not Used: Kazimierczak, Boucaud.
Booked: Martin.
Goals: Sutton 22.
Att: 2,023.
Ref: Trevor Kettle (Rutland).
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