CVE-2006-0539: The convert-fcrontab program in fcron 3.0.0 might allow local users to gain privileges via a long command-l...

Security readout for executives and security teams

CVE-2006-0539 is a possible local privilege escalation issue in fcron 3.0.0. A long command-line argument to convert-fcrontab was reported to corrupt heap memory. Business risk is mainly for older Unix/Linux systems where untrusted local users can access fcron tooling. Exposure is most likely on legacy Linux systems running fcron 3.0.0, especially multi-user hosts, shared servers, or environments where local shell users can invoke fcron migration utilities. The bundle does not identify other affected versions or products. Treat this as a legacy hygiene and local privilege risk. It is not supported by KEV evidence, but vulnerable multi-user systems could let a low-privilege account become more powerful. Prioritize exposed legacy hosts over modern systems without fcron. Mitigation focus: Inventory systems for fcron, prioritizing legacy Linux and multi-user servers.; Check vendor or distribution advisories for fixed fcron packages.; Upgrade or replace fcron 3.0.0 where vendor guidance confirms exposure..

Prepared

Jun 29, 2026, 14:50 UTC (UTC+00:00)

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