Also at nine-under was Chiragh Kumar (67-66) as four players were tied for second.
The unheralded 23-year-old Chinese Taipei's Hung Chien-yao produced a scintillating seven-under-par 64 to snatch a one-shot halfway lead today at the Macau Golf and Country Club with a two-day total of 10-under-par 132.
Lahiri, who featured in the Presidents Cup last week, was amongst those bunched in tied second place following a 67 while others chasing Hung include Korea's Jeunghun Wang (68), Brazilian Adilson Da Silva (65) and Chiragh Kumar.
The other Indian making the cut was Jyoti Randhawa (69-73) as the cut fell at even par 142.
However, Shiv Kapur (73-70), S Chikka (73-71), Arjun Atwal (73-72), Manav Jaini (74-71), Himmat Rai (72-74), Kapil Kumar (69-79), Khalin Joshi (75-75), Shubhankar Sharma (75-76) and Angad Cheema (76-77) missed the cut.
World number 39 Lahiri grabbed an eagle, four birdies and gave away two bogeys to stay on track to successfully defend his title.
"It leaves a bad taste in the mouth. I hit a good drive and just got stuck in a terrible lie and it was a bad five," Lahiri said. "I think I played well, pretty similar to yesterday. But the couple of times I missed the fairway, I found some difficult lies in the rough."
A 4-iron approach from 241 yards out set him up for easy eagle and the current Order of Merit leader is hoping his putter will find its full range this weekend.
