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CVE-1999-1393

14
FAUCET Score

CVE-1999-1393 describes a physical bypass vulnerability affecting Apple Powerbooks. An attacker with physical access could use an emergency startup disk and disk editor to modify the 'aaaaaaaAPWD' file, disabling the "Password Security" option or changing the password. This vulnerability has a CVSS score of 4.6 (Medium), indicating low attack complexity and local access requirements, with potential for partial confidentiality, integrity, and availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this legacy vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
8.5CPE matchmatch criteria
cpe:2.3:o:apple:macos:8.5:*:*:*:*:*:*:*
8.6CPE matchmatch criteria
cpe:2.3:o:apple:macos:8.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.6MEDIUM

AV:L/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 73rd percentile among its peer group of 3,052 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

freaky.staticusers.net / macsec/data/powerbooksecurity-data.html
ExploitVendor Advisory
securityfocus.com / bid/532
ExploitVendor Advisory