CVE-2002-2261: Sendmail

High severity, CVSS 7.5. EPSS: 2% chance of exploitation in the next 30 days.

Sendmail 8.9.0 through 8.12.6 allows remote attackers to bypass relaying restrictions enforced by the 'check_relay' function by spoofing a blank DNS hostname.

Affected products

• Sendmail Sendmail: version 8.9.0 only; version 8.9.1 only; version 8.9.2 only; version 8.9.3 only; version 8.10 only; version 8.10.0 only; …

Published 2002-12-31. Last modified 2026-06-16.