How severe is CVE-1999-1076?

CVE-1999-1076 has a CVSS 2.0 base score of 4.6, rated medium severity.

Is CVE-1999-1076 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1076?

CVE-1999-1076 affects Apple Macos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-1076?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-1076 published?

CVE-1999-1076 was published on 1999-10-26 and last updated on 2026-06-16.

CVE-1999-1076

CVE-1999-1076 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

Severity: Medium (CVSS 2.0 base score 4.6)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apple Macos
Published: 1999-10-26
Last modified: 2026-06-16

Description

Idle locking function in MacOS 9 allows local users to bypass the password protection of idled sessions by selecting the "Log Out" option and selecting a "Cancel" option in the dialog box for an application that attempts to verify that the user wants to log out, which returns the attacker into the locked session.

Frequently asked questions

What is CVE-1999-1076?: Idle locking function in MacOS 9 allows local users to bypass the password protection of idled sessions by selecting the "Log Out" option and selecting a "Cancel" option in the dialog box for an application that attempts to verify that the user wants to log out, which returns the attacker into the locked session.
How severe is CVE-1999-1076?: CVE-1999-1076 has a CVSS 2.0 base score of 4.6, rated medium severity.
Is CVE-1999-1076 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1076?: CVE-1999-1076 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-1076?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1076 published?: CVE-1999-1076 was published on 1999-10-26 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:apple:macos:9:*:*:*:*:*:*:*

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