The Air and Space Forces conducted a successful launch of a Soyuz-2.1b rocket from the launch pad No. 3 of the launch complex No. 43 of the Plesetsk space launch site (Ministry of Defense video). The launch took place at 05:10 MSK on 13 September 2025 (02:10 UTC). The satellites that the rocket and its Fregat boost stage delivered into orbit are a 14F143 Glonass-K navigation satellite No. 18L and a Mozhaets-6 research satellite.

The satellites received designation Cosmos-2595 and Cosmos-2596 (at the moment it's not entirely clear which satellite is which). Their international designations are 2025-206*. NORAD lists two objects, 65589 and 65590 (as well as 65591 identified as a rocket body).

Previous Glonass launch, of a Glonass-K2 satellite, took place in March 2025. Launch of a Glonass-K satellite took place in October 2022.