Remote Code Execution Vulnerability in IBM AIX and PowerVM Products
CVE-2026-16877

8.8HIGH

Key Information:

Vendor

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

What is CVE-2026-16877?

Certain versions of IBM AIX (7.2 and 7.3) and IBM PowerVM (VIOS 4.1) have a vulnerability that enables a remote authenticated attacker to execute arbitrary code. This is due to a stack-based buffer overflow, which occurs when a program writes more data to a buffer than it can hold, potentially allowing the attacker to overwrite executable memory. Through exploitation, the attacker could execute malicious code with the privileges of the affected software processes, potentially leading to unauthorized actions within the system.

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:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
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/).
.