Improper Authentication Vulnerability in IBM AIX and PowerVM
CVE-2026-16857

8.2HIGH

Key Information:

Vendor

IBM
Status
Aix
Powervm ViOS
Vendor
CVE Published:
19 August 2026

What is CVE-2026-16857?

The vulnerability affects IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS version 4.1, where improper authentication mechanisms could be exploited by a remote attacker. This may lead to unauthorized manipulation of network traffic and adjustments to DNS configurations, posing significant risks to data integrity and service availability.

Affected Version(s)

AIX 7.2

AIX 7.3

PowerVM VIOS 4.1

References

https://www.ibm.com/support/pages/node/7283858
vendor-advisorypatch

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

CVE-2026-14970, CVE-2026-15061, CVE-2026-15078, CVE-2026-15065, CVE-2026-15068 were reported to IBM by Oneconsult AG (https://oneconsult.com/).
.