The Bulls' third successive win boosted their promotion hopes, but Wycombe maintain their place in the play-off spots despite a first-ever defeat against Hereford.
Wycombe twice came close to opening the scoring in the first 11 minutes.
Wayne Brown pulled off a fine save to deny Chris Herd and then John McCombe did well to block an effort from the dangerous Scott McGleish.
Hereford's Dean Beckwith powered a header just over from Clint Easton's free-kick and the stretching Gary Hooper just failed to reach a Theo Robinson cross.
With both sides intent on playing good football, McGleish had a shot blocked by Trent McClenahan and Hooper was then out of luck when his shot was headed off the line by Martin.
On the stroke of half-time only a fine save by Frank Fielding kept out Robinson's shot and McCombe's header from the resulting corner was booted off the line by Dave McCracken.
The goal-line clearances continued after the break but this time at the other end, with the Bulls skipper Ben Smith hacking a Herd header away.
As play continued end to end Hooper was denied by a fine save from Fielding after substitute Mike Williamson's slip set him clear.
But Wycombe's luck was out in the 72nd minute. Easton's free-kick into the Wycombe area looked to be posing no danger, Martin could have headed a clearance anywhere, but directed the ball into the top corner of his own net.
Wycombe defender Leon Johnson fired against a post after Brown had done brilliantly to parry Hooper's deflection from a Stefan Oakes free-kick.
Hereford then had to defend in numbers in the closing stages to hold on to three crucial points in their promotion bid.