Piriform

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    Vulnerabilities

    CVE-2017-20201

    CCleaner v5.33.6162 & CCleaner Cloud v1.07.3191 Malicious Backdoor Supply Chain Compromise

    Last Modified: Apr 15, 2026
    Published: Oct 08, 2025

    CVE-2015-3999

    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.

    Last Modified: Apr 12, 2025
    Published: May 20, 2015
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    Piriform Vulnerabilities & Security CVEs | CVE-DB