CVE-1999-1393

CVE-1999-1393 is a medium-severity vulnerability in Apple Macos with a CVSS 2.0 base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Control Panel "Password Security" option for Apple Powerbooks allows attackers with physical access to the machine to bypass the security by booting it with an emergency startup disk and using a disk editor to modify the on/off toggle or password in the aaaaaaaAPWD file, which is normally inaccessible.

Frequently asked questions

What is CVE-1999-1393?
Control Panel "Password Security" option for Apple Powerbooks allows attackers with physical access to the machine to bypass the security by booting it with an emergency startup disk and using a disk editor to modify the on/off toggle or password in the aaaaaaaAPWD file, which is normally inaccessible.
How severe is CVE-1999-1393?
CVE-1999-1393 has a CVSS 2.0 base score of 4.6, rated medium severity.
Is CVE-1999-1393 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1393?
CVE-1999-1393 primarily affects Apple Macos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1393?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1393 published?
CVE-1999-1393 was published on 1999-05-21 and last updated on 2026-06-16.

References

Affected products (2)

More vulnerabilities in Apple Macos

All CVEs affecting Apple Macos →