CVE-2026-16859: IBM i is Affected By Multiple Vulnerabilities in NetServer

Published Aug 12, 2026

Updated

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to obtain sensitive information due to an out-of-bounds read.

Other sources

IBM i could allow a remote attacker to obtain sensitive information due to an out-of-bounds read.

— 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.

Upgrade
Upgrade IBM i 7.6 to a version that resolves this vulnerability.
Patch MJ10939
Upgrade
Upgrade IBM i 7.5 to a version that resolves this vulnerability.
Patch MJ10938
Upgrade
Upgrade IBM i 7.4 to a version that resolves this vulnerability.
Patch MJ10937
Upgrade
Upgrade IBM i 7.3 to a version that resolves this vulnerability.
Patch MJ10936

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·07:50 PM

Data Sourced

via MITRE·07:50 PM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·08:17 PM

DescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

IBM-7283573

Frequently Asked Questions

What is the severity of CVE-2026-16859?

The severity of CVE-2026-16859 is classified as medium with a score of 5.3.

How do I fix CVE-2026-16859?

To fix CVE-2026-16859, ensure that you apply the latest updates and patches provided by IBM for IBM i.

What does CVE-2026-16859 exploit?

CVE-2026-16859 exploits an out-of-bounds read vulnerability that may allow remote attackers to access sensitive information.

Which versions of IBM i are affected by CVE-2026-16859?

CVE-2026-16859 affects IBM i versions 7.3, 7.4, 7.5, and 7.6.

What type of attack does CVE-2026-16859 enable?

CVE-2026-16859 enables remote attackers to obtain sensitive information through an out-of-bounds read.

CVE-2026-16859: IBM i is Affected By Multiple Vulnerabilities in NetServer

Other sources

Affected Software

Remediation

Event History

Parent advisories

Don't miss critical vulnerabilities

Frequently Asked Questions

What is the severity of CVE-2026-16859?

How do I fix CVE-2026-16859?

What does CVE-2026-16859 exploit?

Which versions of IBM i are affected by CVE-2026-16859?

What type of attack does CVE-2026-16859 enable?

Company

Resources

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Frequently Asked Questions

What is the severity of CVE-2026-16859?

How do I fix CVE-2026-16859?

What does CVE-2026-16859 exploit?

Which versions of IBM i are affected by CVE-2026-16859?

What type of attack does CVE-2026-16859 enable?