Before Ireland’s Six Nations win over Scotland in March, which secured the triple Crown, Farrell said he expected both Lowe and centre Bundee Aki to sign new contracts.
Aki has agreed a new one-year deal to stay with Connacht but there has not been any progress with Lowe, who is contracted by Leinster rather than an central contract with the Irish Rugby Football Union [IRFU].
Lowe did not make the squad for the Champions Cup final defeat by Bordeaux despite having returned from a hamstring injury sustained in the Six Nations win over England.
However, his two record-breaking tries on Saturday show he is still a threat when fit and available.
While Cullen declined to comment on his future, he did praise the impact Lowe has made since he moved to Ireland nine years ago.
“He’s been a great character in the group. Very, very different, you know, what he brings, great energy,” Cullen said after the game.
“Internally, we had a video there just in terms of some of the stuff that he’s done in a Leinster jersey over his career.
“There’s not many James Lowes running around the streets that we’ve come across so far. He’s been a great addition to the group over the years.”
