CVE-2026-17073

IBM i is Affected By Improper Authorization and Access Control Vulnerabilities in Network File System

Published Oct 16, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
IBM i 7.3, 7.4, 7.5, and 7.6 could allow a local attacker to obtain sensitive information due to missing subtree checks during file handle resolution.

Remediation

Vendor Solution

Application of the PTFs require additional actions that if not taken will cause existing NFS mounts to become inaccessible. View each PTF's cover letter for the additional actions required prior to installation. IBM i Release5770-SS1  PTF Number(s)PTF Download Link(s)7.6SJ11753 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11753 7.5SJ11790 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11790 7.4SJ11802 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11802 7.3SJ11804 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11804 IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description IBM i 7.3, 7.4, 7.5, and 7.6 could allow a local attacker to obtain sensitive information due to missing subtree checks during file handle resolution.
Title IBM i is Affected By Improper Authorization and Access Control Vulnerabilities in Network File System
First Time appeared Ibm
Ibm i
Weaknesses CWE-284
CPEs cpe:2.3:a:ibm:i:7.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*
cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*
cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm i
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
Oct 21, 2026, 9:25 PM
Reserved
Jul 24, 2026, 2:11 PM
Status
Analyzed
Published
Oct 16, 2026, 7:17 PM
Modified
Oct 23, 2026, 3:56 PM