Description
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to obtain sensitive information due to improper authentication.
Published: 2026-08-20
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability allows a remote attacker to obtain sensitive information because the system authentication is not enforced correctly. The issue is characterized as a weakness in authentication (CWE‑287). If exploited, the attacker could view confidential system data, potentially undermining confidentiality and exposing additional system details.

Affected Systems

IBM AIX 7.2 and 7.3 (any intermediate milestone level prior to SP13 for 7.2 or SP5 for 7.3) and IBM PowerVM VIOS 4.1 (legacy 4.1.0, 4.1.1, 4.1.2 levels) are affected. The effective remediation levels are AIX SP2 for 7.3 TL04, SP3 for 7.3 TL03, SP5 for 7.3 TL02, SP13 for 7.2 TL05, and VIOS FP 4.1.2.20, 4.1.1.30, or 4.1.0.50, all of which include cumulative fixes for this and prior vulnerabilities.

Risk and Exploitability

The CVSS score of 6.5 indicates moderate severity. EPSS data is currently not available and the vulnerability is not listed in the CISA KEV catalog. Based on the description, a remote attacker could obtain sensitive information by bypassing authentication mechanisms. The likely attack vector is remote, with the attacker needing to reach the authentication service over the network to exploit the flaw. No further exploitation prerequisites or privilege escalation steps are described in the provided data.

Generated by OpenCVE AI on August 21, 2026 at 00:42 UTC.

Remediation

Vendor Solution

A.  APARS IBM has assigned the following APARs to this problem: AIX LevelAPARAvailability  SPKEY7.2.5IJ5956608/14/2026SP13key_w_apar7.3.2IJ5956508/14/2026SP05key_w_apar7.3.3IJ5956408/14/2026SP03key_w_apar7.3.4IJ59563 08/14/2026SP02key_w_apar VIOS LevelAPARAvailability SPKEY4.1.0IJ5956508/14/20264.1.0.50key_w_apar4.1.1IJ5956408/14/20264.1.1.30key_w_apar4.1.2IJ5956308/14/20264.1.2.20key_w_apar B.  FIXES IBM strongly recommends addressing the vulnerability now.  AIX and VIOS fixes are available and can be downloaded from Fix Central: https://www.ibm.com/support/fixcentral  An LPAR reboot is required to complete the SP/FP update. On AIX, Live Update can be used to avoid a reboot.  IBM has assigned the following AIX Service Packs (SPs) and VIOS Fix Packs (FPs) as the remediation levels for the published vulnerabilities. AIX Level Service PackAIX 7.3 TL04SP2AIX 7.3 TL03SP3AIX 7.3 TL02SP5AIX 7.2 TL05 SP13 PowerVM VIOS LevelFix PackVIOS 4.1.2 4.1.2.20VIOS 4.1.1 4.1.1.30VIOS 4.1.0  4.1.0.50 Note: These SPs/FPs are cumulative and include fixes for all previously published AIX/VIOS security vulnerabilities. They can be applied on top of any earlier affected level of the TL . Note: To apply these patches using nimsh secure, special steps must be taken as the protocol between master and client is updated to be more secure. Please read this article: https://www.ibm.com/support/pages/node/7283157 Note: For VIOS 4.1.0 and VIOS 4.1.1, additional steps are required to migrate to the latest Postgres15 after applying the 4.1.1.30 or 4.1.0.50 FPs above. Instructions to do that can be found here:                             4.1.0.50 post-update instructions: https://www.ibm.com/support/pages/node/7283819           4.1.1.30 post-update instructions: https://www.ibm.com/support/pages/node/7283823


OpenCVE Recommended Actions

  • Apply the latest IBM AIX Service Pack or PowerVM VIOS Fix Pack from Fix Central (AIX SP2 for 7.3 TL04, SP13 for 7.2 TL05, or equivalent SP/FP levels) to address the authentication flaw.
  • On AIX systems, use Live Update to install the patches without rebooting, or reboot the LPAR afterward for VIOS or when Live Upgrade is not applicable.
  • If the system runs VIOS 4.1.0 or 4.1.1, follow IBM’s post‑update instructions to migrate to PostgreSQL 15 before or after applying the FP. Also review IBM’s nimsh secure guidance if using nimsh for patch deployment.

Generated by OpenCVE AI on August 21, 2026 at 00:42 UTC.

Tracking

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Advisories

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History

Mon, 24 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
First Time appeared Ibm vios
CPEs cpe:2.3:a:ibm:vios:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:*
Vendors & Products Ibm vios

Fri, 21 Aug 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 20 Aug 2026 22:00:00 +0000

Type Values Removed Values Added
Description IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to obtain sensitive information due to improper authentication.
Title Vulnerabilities in IBM AIX and PowerVM VIOS
First Time appeared Ibm
Ibm aix
Ibm powervm Vios
Weaknesses CWE-287
CPEs cpe:2.3:a:ibm:aix:7.2.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:aix:7.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:aix:7.3.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:aix:7.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:powervm_vios:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:powervm_vios:4.1:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm aix
Ibm powervm Vios
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published:

Updated: 2026-08-21T11:18:14.016Z

Reserved: 2026-07-24T08:24:56.549Z

Link: CVE-2026-16972

cve-icon Vulnrichment

Updated: 2026-08-21T11:18:10.348Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-20T22:17:09.647

Modified: 2026-08-24T17:22:32.890

Link: CVE-2026-16972

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-21T00:45:07Z

Weaknesses