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High severity8.2NVD Advisory· Published Apr 21, 2021· Updated Jun 17, 2026

CVE-2021-20501

CVE-2021-20501

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

6
  • IBM/I6 versions
    cpe:2.3:o:ibm:i:7.1:*:*:*:*:*:*:*+ 5 more
    • cpe:2.3:o:ibm:i:7.1:*:*:*:*:*:*:*
    • cpe:2.3:o:ibm:i:7.2:*:*:*:*:*:*:*
    • cpe:2.3:o:ibm:i:7.3:*:*:*:*:*:*:*
    • cpe:2.3:o:ibm:i:7.4:*:*:*:*:*:*:*
    • (no CPE)range: 7.1, 7.2, 7.3, and 7.4
    • (no CPE)range: 7.1

Patches

Vulnerability mechanics

References

2

News mentions

0

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