CVE-1999-0203: In Sendmail, attackers can gain root privileges via SMTP by specifying an improper "mail from" address and an invalid "r

Published n/a Updated 2026-08-21T04:30:36.679Z

Summary

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.

Severity

UNKNOWN

Source Attribution

Source: NVD · Updated: 2026-08-21T04:30:36.679Z · Confidence: high

Impact

Based on CVSS vector: n/a — assess confidentiality, integrity, and availability impact via the official vector documentation.

Affected Software

Fix

Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.

References