For the mirror universe counterpart, see ISS Avenger (NX-09).

Avenger (NX-09) was an NX class starship in Starfleet service in the mid-22nd century.

Avenger had been lost in the Beta Quadrant at some point but was salvaged by a group of Chalnoth pirates in the 24th century. These pirates later attempted to raid Yattho territory, though the precognitive race had predicted this and invited the Klingon Defence Force to test its Vor'cha class prototype in the general vicinity of the raid. The Chalnoth-controlled Avenger was destroyed by a Yattho star cruiser during the battle, the crew having predicted exactly where the ship would go. (Data, son of Soong)

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