Basically what your are looking for is a ```Spatial Join```.

 1. Import the CSV file as a point layer. Delimiter, X-field, Y-field and Coordinate System are important 
[![enter image description here][1]][1]
 2. Make a spatial join between your points and polygons using ```Data Management Tools --> Join Attributes by Location...``` using the Polygon Layer as the baselayer and your points as the joined layer. For the Geoemetric predicate ```intersects```.
[![enter image description here][2]][2]
[![enter image description here][3]][3]
 3. On the newly created ```Joined layer``` write a ```Feature Filter``` where you filter all the features which have no relation to your CSV data away using some field from the CSV data layer.
[![enter image description here][4]][4]
 4. Apply a red style on the new layer using the ```Symbology```
[![enter image description here][5]][5]


  [1]: https://i.sstatic.net/MND4n.png
  [2]: https://i.sstatic.net/3Nllg.png
  [3]: https://i.sstatic.net/jbKaA.png
  [4]: https://i.sstatic.net/0Ppyr.png
  [5]: https://i.sstatic.net/wN27k.png