How severe is CVE-1999-0863?

CVE-1999-0863 has a CVSS 2.0 base score of 4.6, rated medium severity.

Is CVE-1999-0863 being actively exploited?

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

What products are affected by CVE-1999-0863?

CVE-1999-0863 affects Freebsd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0863?

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

When was CVE-1999-0863 published?

CVE-1999-0863 was published on 1999-11-08 and last updated on 2026-06-16.

CVE-1999-0863

CVE-1999-0863 is a medium-severity vulnerability in Freebsd 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% (30th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Freebsd
Published: 1999-11-08
Last modified: 2026-06-16

Description

Buffer overflow in FreeBSD seyon via HOME environmental variable, -emulator argument, -modems argument, or the GUI.

Frequently asked questions

What is CVE-1999-0863?: Buffer overflow in FreeBSD seyon via HOME environmental variable, -emulator argument, -modems argument, or the GUI.
How severe is CVE-1999-0863?: CVE-1999-0863 has a CVSS 2.0 base score of 4.6, rated medium severity.
Is CVE-1999-0863 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0863?: CVE-1999-0863 affects Freebsd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0863?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0863 published?: CVE-1999-0863 was published on 1999-11-08 and last updated on 2026-06-16.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0863

Affected products (1)

cpe:2.3:o:freebsd:freebsd:3.3:*:*:*:*:*:*:*

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