Remote File Overwrite Vulnerability in IBM AIX and PowerVM
CVE-2026-16926

9.1CRITICAL

Key Information:

Vendor

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

What is CVE-2026-16926?

IBM AIX versions 7.2 and 7.3, along with PowerVM VIOS 4.1, may be susceptible to a security flaw that permits a remote attacker to overwrite arbitrary files. This vulnerability arises from the improper handling of special elements in user input, creating a risk for the integrity of the system. It is crucial for users and administrators to apply relevant patches and updates to mitigate potential exploitation.

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:
9.1
Severity:
CRITICAL
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/).
.