CVE-2020-15396: In HylaFAX+ through 7.0.2 and HylaFAX Enterprise, the faxsetup utility calls chown on files in user-owned d...

Security readout for executives and security teams

This flaw can let someone who already has local access to a HylaFAX server turn that access into root control. The vulnerable behavior is in the faxsetup utility, which changes ownership of files inside user-owned directories in a race-prone way. Exposure is likely limited to systems running HylaFAX+ through 7.0.2 or HylaFAX Enterprise, especially multi-user Linux or Unix servers where local users can interact with relevant setup paths. Treat this as a focused server hardening issue. It is serious where HylaFAX is installed because successful exploitation can mean root access, but the available evidence indicates local access is required and does not show active exploitation. Mitigation focus: Identify HylaFAX+ and HylaFAX Enterprise installations across servers.; Follow HylaFAX and distro vendor advisories for fixed package guidance.; Prioritize Gentoo, Fedora, and openSUSE systems with referenced security updates..

Prepared

Jun 5, 2026, 14:11 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.