CVE-2026-16941Network attack vector

Authenticated system-message modification via improper authorization

Published Sep 4, 2026 · Updated Sep 4, 2026

Incorrect authorization in IBMi 7.4, 7.5, and 7.6 allows remote authenticated users to modify certain system messages. IBM has not disclosed the message-handling component or the authorization check missing or incorrectly enforced during message changes. A valid remote account is required, and the documented consequence is limited to unauthorized alteration of system-message content.

CVSS severity4.3
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in IBMi 7.4, 7.5, and 7.6 allows remote authenticated users to modify certain system messages. IBM has not disclosed the message-handling component or the authorization check missing or incorrectly enforced during message changes. A valid remote account is required, and the documented consequence is limited to unauthorized alteration of system-message content.

The record

CVE
CVE-2026-16941
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
IBM
Product
IBM i
Classifications
CWE-863, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.4
  2. Affected versionversion=7.5
  3. Affected versionversion=7.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM iversion=7.4; version=7.5; version=7.6

Published CVSS scores

4.3IBMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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