SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-1999-1543

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

EXPLOIT ✓MEDIUM 4.6EPSS 0.83%

Does this matter?

A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 0.8%. Treat it as high on anything reachable from the internet.

Description

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

CVSS 2.0
4.6 MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P
EPSS
0.83% probability · 57th percentile
Public exploits
1 in Exploit-DB · verified · first 10 July 1999
CISA KEV
Not listed
Affected
apple/macos
Source
cve@mitre.org
EPSS trend
0%3%5%26 October 2026: 0.83%26 October 202626 October 2026

EPSS 0.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-19417source ↗Apple Mac OS 8 8.6 - Weak Password Encryptionosx · Dawid adix Adamskilocal10 July 1999yes

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.