A few data gathered to clarify the issue:
https://partyardmilitary.com/hypersonic-missiles-what-are-they-and-can-they-be-stopped/
A supersonic missile exceeds the speed of sound (Mach 1) but is not faster than Mach-3. Most supersonic missiles travel at a speed between Mach-2 and Mach-3, which is up to 2,300 mph.
The most well-known supersonic missile is the Indian/Russian BrahMos, is currently the fastest operational supersonic missile capable of speeds around 2,100–2,300 mph.
A hypersonic missile travels at speeds of Mach 5 and higher – five times faster than the speed of sound (3836 mph), which is around 1 mile per second.
Some missiles, such as Russia’s Kh-47M2 Kinzhal air-launched ballistic missile, are allegedly capable of reaching Mach 10 speeds (7672 mph) and distances up to 1200 miles.
Hypersonic missiles come in two variants: hypersonic cruise missiles and hypersonic glide vehicles.
Hypersonic cruise missile:
This type of missile reaches its target with the help of a high-speed jet engine that allows it to travel at extreme speeds, in excess of Mach-5.
It is non-ballistic – the opposite of traditional Intercontinental Ballistic Missiles (ICBM) which utilizes gravitational forces to reach its target.
Hypersonic glide vehicle:
This type of hypersonic missile utilizes re-entry vehicles.
Initially, the missile is launched into space on an arching trajectory, where the warheads are released and fall towards the atmosphere at hypersonic speeds.
Rather than leaving the payload at the mercy of gravitational forces – as is the case for traditional ICBMs – the warheads are attached to a glide vehicle which re-enters the atmosphere, and through its aerodynamic shape it can ride the shockwaves generated by its own lift as it breaches the speed of sound, giving it enough speed to overcome existing missile defense systems.
The glide vehicle surfs on the atmosphere between 40-100km in altitude and reaches its destination by leveraging aerodynamic force
When hypersonic missiles become operational, the gap between missile defense systems and missile offence becomes huge.
Simply put, there is no operational missile defense system that is capable of intercepting a hypersonic missile, which is why the race to develop hypersonic weapons is such an hot one.
Hypersonic missiles offer a number of advantages over subsonic and supersonic weapons, particularly with regard to the prosecution of time-critical targets (for example, mobile ballistic missile launchers), where the additional speed of a hypersonic weapon is valuable.
It can also overcome the defenses of heavily-defended targets (such as an aircraft carrier).
There is currently no operational or reliable method of intercepting them
Technologies such as directed energy weapons, particle beams and other non-kinetic weapons are likely candidates for an effective defense against hypersonic missiles