Bradley Wright-Phillips made it two goals in two games to move Charlton up to fifth in the League One table.
The former Plymouth frontman was on hand to slot home from a Johnnie Jackson corner to give Chris Powell's side all three points.
Jackson was denied by Stephen Henderson early on before Paul Huntington headed over from a corner for Yeovil.
Terry Skiverton`s team dominated thereafter but could not make it count and were duly punished just after the hour mark.
Jackson swung over a corner and his delivery was pounced on by Wright-Phillips, who fired into the top corner from six yards.M
Defeat leaves the Glovers just two points above the relegation zone.
Copyright (c) PA Sport 2009, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: https://www.givemesport.com/writeforgms