CVE-2026-16892Network attack vector

Authenticated restriction bypass via service-name matching

Published Sep 4, 2026 · Updated Sep 4, 2026

Improper authentication in IBM Power platform releases 7.3 through 7.6 allows remote authenticated users to bypass security restrictions. Network Authentication Service improperly authenticates a service while matching its name; the vendor has not disclosed the affected function or exact matching error. A valid remote account is required, and the reported consequence is limited to unauthorized confidentiality and integrity effects without service interruption.

CVSS severity5.4
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in IBM Power platform releases 7.3 through 7.6 allows remote authenticated users to bypass security restrictions. Network Authentication Service improperly authenticates a service while matching its name; the vendor has not disclosed the affected function or exact matching error. A valid remote account is required, and the reported consequence is limited to unauthorized confidentiality and integrity effects without service interruption.

The record

CVE
CVE-2026-16892
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
IBM
Product
IBM i
Classifications
CWE-287, T1210
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=7.3
  2. Affected versionversion=7.4
  3. Affected versionversion=7.5
  4. Affected versionversion=7.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM iversion=7.3; version=7.4; version=7.5; version=7.6

Published CVSS scores

5.4IBMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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