CVE-2026-17220: IBM i is Affected By Multiple Vulnerabilities in Host Servers

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 and modify authentication metadata due to a buffer overflow.

Other sources

IBM i could allow a remote attacker to cause a denial of service and modify authentication metadata due to a buffer overflow.

— IBM

Affected Software

5 affected components
IBM IBM i>=7.3<=7.6
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 (IBM i Release 5770-SS1) to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ10848
  2. Upgrade

    Upgrade IBM i 7.6 (IBM i Release 5770-SS1) to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ10899
  3. Upgrade

    Upgrade IBM i 7.6 (IBM i Release 5770-SS1) to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ11022
  4. Upgrade

    Upgrade IBM i 7.6 (IBM i Release 5770-SS1) to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ11101
  5. Upgrade

    Upgrade IBM i 7.6 (IBM i Release 5770-SS1) to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ11097
  6. Upgrade

    Upgrade IBM i 7.6 (IBM i Release 5770-SS1) to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ11098
  7. Upgrade

    Upgrade IBM i 7.6 (IBM i Release 5770-SS1) to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ11099
  8. Upgrade

    Upgrade IBM i 7.6 (IBM i Release 5770-SS1) to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ11100
  9. Upgrade

    Upgrade IBM i 7.6 (IBM i Release 5770-SS1) to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ11102
  10. Upgrade

    Upgrade IBM i 7.6 (IBM i Release 5770-SS1) to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ11103
  11. Upgrade

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

    Fixed in 7.5Patch SJ11102
  12. Upgrade

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

    Fixed in 7.4Patch SJ11103
  13. Upgrade

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

    Fixed in 7.3Patch SJ11104
  14. Compensating control

    If running unsupported versions of affected products, upgrade to a supported and fixed version (IBM recommendation).

Event History

Aug 13, 2026
CVE Published
via MITRE·06:49 PM
Data Sourced
via MITRE·06:49 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·07:17 PM
DescriptionSeverityWeakness
Aug 14, 2026
Data Sourced
via IBM·07:00 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203