Vietcombank sold the greenback at VND26,351, down 0.004% from the weekend. The currency rose 0.18% to VND27,750 on the black market.
The State Bank of Vietnam lowered its reference rate by 0.004% to VND25,097.
Globally, the U.S. dollar rose to a more-than-two-week high against the yen on Monday at the start of a packed week of global trade negotiations and central bank meetings, Reuters reported.
The dollar rose 0.15% to 153.07 against the yen and touched 153.17, the strongest since Oct. 10. The dollar index, which measures the greenback against select peers, rose 0.05% to 98.97.
The euro was steady at $1.1622. Sterling strengthened 0.04% to $1.3314. The Aussie gained 0.2% versus the greenback to $0.6528.
"Looking ahead we think that dollar firmness is likely to remain in the near term," Mahjabeen Zaman, head of foreign exchange research at ANZ, said on a podcast.
"Fed cuts are fully priced in for October and December meetings. So if anything, any cautious communication from the Fed would likely be more supportive for the U.S. dollar."