CVE-2026-16896 PUBLISHED

IBM i is Affected By Multiple Vulnerabilities in Network Authentication Service

Assigner: ibm
Reserved: 24.07.2026 Published: 13.08.2026 Updated: 13.08.2026

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local authenticated attacker to obtain unauthorized access to files due to a time-of-check time-of-use (TOCTOU) race condition.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 7.1

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	IBM
Product	i
Versions	Version 7.6 is affected Version 7.5 is affected Version 7.4 is affected Version 7.3 is affected

Solutions

IBM i Release5770-SS1 PTF Number(s)PTF Download Link(s)7.6SJ11094 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11094 7.5SJ11093 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11093 7.4SJ11095 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11095 7.3SJ11096 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11096

IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.

References

https://www.ibm.com/support/pages/node/7283293

Problem Types

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition CWE