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TI-2021-03751 Aliases CVE-2021-20501GHSA-5c9g-84hr-f4w2

IBM i 7.1, 7.2, 7.3, and 7.4 SMTP allows a network attacker to send emails to…

Priority LOW 38Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.01338 71st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
IBMi7.1; 7.2; 7.3; 7.4—No fix listedCNA
  • i VendorIBM Affected 7.1; 7.2; 7.3; 7.4 Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:ibm:i:7.1:*:*:*:*:*:*:*7.1VulnerableIBM
cpe:2.3:o:ibm:i:7.2:*:*:*:*:*:*:*7.2VulnerableIBM
cpe:2.3:o:ibm:i:7.3:*:*:*:*:*:*:*7.3VulnerableIBM
cpe:2.3:o:ibm:i:7.4:*:*:*:*:*:*:*7.4VulnerableIBM
  • cpe:2.3:o:ibm:i:7.1:*:*:*:*:*:*:* Versions 7.1 Vulnerable ·IBM
  • cpe:2.3:o:ibm:i:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·IBM
  • cpe:2.3:o:ibm:i:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·IBM
  • cpe:2.3:o:ibm:i:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·IBM

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20501
  2. 2026-10-03 Alias added: GHSA-5c9g-84hr-f4w2

References

Advisory 1

  • TI-2024-18115 IBM i privilege escalation CVSS 3.1HIGH 7.8
  • TI-2026-14283 IBM i is Affected By Remote Code Execution Vulnerability in Line Printer Daemon [] CVSS 3.1CRITICAL 9.8
  • TI-2023-14729 IBM i command execution CVSS 3.1CRITICAL 9.8
  • TI-2026-14279 IBM i is Affected By Denial of Service Vulnerabilities in NFS [, ] CVSS 3.1CRITICAL 9.1
  • TI-2026-14196 IBM i is Affected By Denial of Service Vulnerabilities in NFS [, ] CVSS 3.1CRITICAL 9.1
  • TI-2026-13994 IBM i is Affected By Multiple Vulnerabilities in Simple Mail Transfer Protocol CVSS 3.1CRITICAL 9.1
See all 207 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences