How severe is CVE-1999-0590?

CVE-1999-0590 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-1999-0590 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0590?

CVE-1999-0590 primarily affects Apple Macos. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0590?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-1999-0590 published?

CVE-1999-0590 was published on 2000-06-01 and last updated on 2026-06-16.

CVE-1999-0590

CVE-1999-0590 is a critical-severity vulnerability in Apple Macos with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apple Macos
Published: 2000-06-01
Last modified: 2026-06-16

Description

A system does not present an appropriate legal message or warning to a user who is accessing it.

Frequently asked questions

What is CVE-1999-0590?: A system does not present an appropriate legal message or warning to a user who is accessing it.
How severe is CVE-1999-0590?: CVE-1999-0590 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-1999-0590 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0590?: CVE-1999-0590 primarily affects Apple Macos. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0590?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-1999-0590 published?: CVE-1999-0590 was published on 2000-06-01 and last updated on 2026-06-16.

References

http://ciac.llnl.gov/ciac/bulletins/j-043.shtml

Affected products (11)

cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.20.1:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_95:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_98:*:gold:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:3.5.1:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:3.5.1:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:3.5.1:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:3.5.1:sp3:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:3.5.1:sp5:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*

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