CVE-1999-0203

High CVSS 10

Published 1995-08-17 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-1999-0203, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

In Sendmail, attackers can gain root privileges via SMTP by specifying an improper "mail from" address and an invalid "rcpt to" address that would cause the mail to bounce to a program.

Sources

NVD record for CVE-1999-0203

CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C