State Chancellery Director Martins Krievins told reporters the total number of applicants was ten, which came as a surprise as previously only four people had confirmed their candidature.
All candidates will be evaluated by the Constitutional Protection Bureau, Latvia's secret service, said Krievins.
The commission will now meet on October 28, while information on candidates shortlisted for the second round of competition will be published on the Cabinet of Ministers' website on November 1.
As reported, the current Corruption Prevention Bureau head Jaroslavs Strelcenoks' term in office ends November 17.
Strelcenoks wants to keep his job, but has come under heavy criticism during his four-year tenure.
Indeed KNAB's remit to fight corruption has been repeatedly hampered for a decade by attempts at political interference, internal dissent and dissatisfaction with its leadership.
But with US Vice President Joe Biden reasserting on a recent visit to Latvia that weeding out corruption is still of prime importance, a good deal of international attention will be given to whoever takes over at KNAB.