80 degrees is not good. It will definitely shorten your processor’s useful lifespan and could quite possibly nuke it totally. Seems the builder of your system didn’t provide adequate cooling. This happens surprisingly often with OEM kit as the builders tend to assume that the buyers aren’t going to really push the system to the limit and that they can get away with a weak cooling solution.
Things to check that might shave a degree or two off your temps while waiting for any new cooling equipment you need to arrive (These are NOT long term solutions):
Check all the fans are running, including your intake and exhaust fans, as well as all heatsink fans.
Check that the airflow through the case is correct. If one or more case fans have been mounted back to front then this will definitely not help. the fan(s) at the front of the case should be sucking air into the case and the ones at the back should be pushing it out, creating a front to back airflow.
If your case has fan filters, check they’re clean.
If you can change fan settings in the BIOS then turn all your fans up to max. Your machine will make quite a racket like this but it should drag temps down a bit.
None of this is a permanant solution and I’d advise you invest in a new CPU cooler, preferably an all-copper one and some new case fans.
If your case has only one exhaust fan at the back then get another fan for sucking air in at the front and maybe a second exhaust fan.
If the fans in use in your system are 80mm but the case can take 120 mm fans then go fot the 120s. They can shift more air at a given RPM than the smaller fans and can therefore run safely at lower RPM and will be quieter.
the Intel stock cooler is obviously struggling. Replace it with a better model. Also, get some Arctic Silver thermal transfer compound and some CPU/Heatsink cleaner. Remove every last trace of the old thermal compound and properly apply some Arctic Silver to the surfaces to be mated before fitting your new heatsink.
If heating is still a problem after all that then you might need to look into water cooling.