How severe is CVE-1999-0478?

CVE-1999-0478 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-0478 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0478?

CVE-1999-0478 affects Sendmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0478?

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

When was CVE-1999-0478 published?

CVE-1999-0478 was published on 1998-12-01 and last updated on 2026-06-16.

CVE-1999-0478

CVE-1999-0478 is a medium-severity vulnerability in Sendmail with a CVSS 2.0 base score of 5.0. 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 5.0)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Sendmail
Published: 1998-12-01
Last modified: 2026-06-16

Description

Denial of service in HP-UX sendmail 8.8.6 related to accepting connections.

Frequently asked questions

What is CVE-1999-0478?: Denial of service in HP-UX sendmail 8.8.6 related to accepting connections.
How severe is CVE-1999-0478?: CVE-1999-0478 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-0478 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0478?: CVE-1999-0478 affects Sendmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0478?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0478 published?: CVE-1999-0478 was published on 1998-12-01 and last updated on 2026-06-16.

References

http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX9904-097

Affected products (1)

cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:*

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