CVE-1999-0684

CVE-1999-0684 is a medium-severity vulnerability in Hp 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: 2% (83rd percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Hp Sendmail
• Published: 1999-04-19
• Last modified: 2026-06-16

Description

Denial of service in Sendmail 8.8.6 in HPUX.

Frequently asked questions

What is CVE-1999-0684?

Denial of service in Sendmail 8.8.6 in HPUX.

How severe is CVE-1999-0684?

CVE-1999-0684 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-0684 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0684?

CVE-1999-0684 affects Hp Sendmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0684?

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

When was CVE-1999-0684 published?

CVE-1999-0684 was published on 1999-04-19 and last updated on 2026-06-16.

References

• https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0684

Affected products (1)

• cpe:2.3:a:hp:sendmail:8.8.6:*:*:*:*:*:*:*