CVE-2021-20501

HighCVSS 8.2/10Last modified Jun 17, 2026

Description

IBM i 7.1, 7.2, 7.3, and 7.4 SMTP allows a network attacker to send emails to non-existent local-domain recipients to the SMTP server, caused by using a non-default configuration. An attacker could exploit this vulnerability to consume unnecessary network bandwidth and disk space, and allow remote attackers to send spam email. IBM X-Force ID: 198056.

Metrics

CVSS 3.1 8.2/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected software

No affected versions have been published.

Timeline

Published: Apr 21, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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