CVE-1999-0420

CVE-1999-0420 is a high-severity vulnerability in Netbsd Umapfs with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

umapfs allows local users to gain root privileges by changing their uid through a malicious mount_umap program.

Frequently asked questions

What is CVE-1999-0420?
umapfs allows local users to gain root privileges by changing their uid through a malicious mount_umap program.
How severe is CVE-1999-0420?
CVE-1999-0420 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-1999-0420 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0420?
CVE-1999-0420 affects Netbsd Umapfs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0420?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-1999-0420 published?
CVE-1999-0420 was published on 1999-03-17 and last updated on 2026-06-16.

References

Affected products (1)