Nitro Pro 7.5.0.22 and earlier and Nitro Reader 2.5.0.36 and earlier allow remote attackers to execute arbitrary code via a crafted PDF file.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-3488
https://docs.microsoft.com/en-us/security-updates/vulnerabilityresearchadvisories/2013/msvr13-007