CVE-1999-1077: Apple macOS

Medium severity, CVSS 4.6. EPSS: 0.4% chance of exploitation in the next 30 days.

Idle locking function in MacOS 9 allows local attackers to bypass the password protection of idled sessions via the programmer's switch or CMD-PWR keyboard sequence, which brings up a debugger that the attacker can use to disable the lock.

Affected products

• Apple macOS: version 9 only

Published 1999-11-01. Last modified 2026-06-16.