CVE-1999-1580

CVE-1999-1580 is a high-severity vulnerability in Sendmail 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

SunOS sendmail 5.59 through 5.65 uses popen to process a forwarding host argument, which allows local users to gain root privileges by modifying the IFS (Internal Field Separator) variable and passing crafted values to the -oR option.

Frequently asked questions

What is CVE-1999-1580?
SunOS sendmail 5.59 through 5.65 uses popen to process a forwarding host argument, which allows local users to gain root privileges by modifying the IFS (Internal Field Separator) variable and passing crafted values to the -oR option.
How severe is CVE-1999-1580?
CVE-1999-1580 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-1999-1580 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1580?
CVE-1999-1580 primarily affects Sendmail. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1580?
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-1999-1580 published?
CVE-1999-1580 was published on 1995-08-23 and last updated on 2026-06-16.

References

Affected products (10)

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