CVE-1999-1543: Apple macOS

Medium severity, CVSS 4.6. EPSS: 0.8% chance of exploitation in the next 30 days.

MacOS uses weak encryption for passwords that are stored in the Users & Groups Data File.

Affected products

• Apple macOS: version 7.5.3 only; version 7.6 only; version 7.6.1 only; version 8.0 only; version 8.1 only; version 8.5 only; …

Published 1999-07-10. Last modified 2026-06-16.