CVE-2000-0990: Krzysztof Dabrowski CMD5CHECKPW

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

cmd5checkpw 0.21 and earlier allows remote attackers to cause a denial of service via an "SMTP AUTH" command with an unknown username.

Affected products

• Krzysztof Dabrowski CMD5CHECKPW: version 0.20 only; version 0.21 only

Published 2000-12-19. Last modified 2026-09-23.