CVE-2026-18077: IBM i is Affected By Multiple Vulnerabilities in Simple Mail Transfer Protocol

Published Aug 12, 2026
·
Updated

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to a stack-based buffer overflow.

Other sources

IBM i could allow a remote attacker to cause a denial of service due to a stack-based buffer overflow.

— IBM

Affected Software

4 affected components
IBM i<=7.6
IBM i<=7.5
IBM i<=7.4
IBM i<=7.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade IBM i 7.6 to a version that resolves this vulnerability.

    Patch SJ11061
  2. Upgrade

    Upgrade IBM i 7.6 to a version that resolves this vulnerability.

    Patch SJ11123
  3. Upgrade

    Upgrade IBM i 7.6 to a version that resolves this vulnerability.

    Patch SJ11127
  4. Upgrade

    Upgrade IBM i 7.6 to a version that resolves this vulnerability.

    Patch SJ11129
  5. Upgrade

    Upgrade IBM i 7.6 to a version that resolves this vulnerability.

    Patch SJ11131
  6. Upgrade

    Upgrade IBM i 7.3 to a version that resolves this vulnerability.

    Patch SJ11084
  7. Upgrade

    Upgrade IBM i 7.4 to a version that resolves this vulnerability.

    Patch SJ11083
  8. Upgrade

    Upgrade IBM i 7.5 to a version that resolves this vulnerability.

    Patch SJ11074

Event History

Aug 12, 2026
CVE Published
via IBM·12:00 AM
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
Aug 13, 2026
CVE Published
via MITRE·08:41 PM
Data Sourced
via MITRE·08:41 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

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