CVE-2015-3999: Piriform Ccleaner

Low severity, CVSS 2.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Piriform CCleaner 3.26.0.1988 through 5.02.5101 writes the filenames to disk when overwriting files, which allows local users to obtain sensitive information by searching unallocated disk space.

Affected products

• Piriform Ccleaner: version 3.26.1888 only; version 3.27.1900 only; version 3.28.1913 only; version 4.00.4064 only; version 4.01.4093 only; version 4.02.4115 only; …

Published 2015-05-20. Last modified 2026-06-17.