CVE-2026-16877: Buffer Overflow

Q: Does exploitation require prior access?

Yes. The issue is described as exploitable by a remote authenticated attacker, so the attacker must have valid authenticated access before attempting exploitation.

Q: Which IBM platforms are identified as affected?

The affected software listed is IBM AIX and IBM PowerVM VIOS.

Published Aug 15, 2026

Updated

AIX could allow a remote authenticated attacker to execute arbitrary code due to a stack-based buffer overflow.

Affected Software

3 affected components

IBM AIX<=7.2

IBM AIX<=7.3

IBM PowerVM VIOS<=4.1

Event History

Aug 15, 2026

CVE Published

via IBM·12:00 AM

Data Sourced

via IBM·12:00 AM

DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

IBM-7283858

Frequently Asked Questions

Does exploitation require prior access?

Yes. The issue is described as exploitable by a remote authenticated attacker, so the attacker must have valid authenticated access before attempting exploitation.

Which IBM platforms are identified as affected?

The affected software listed is IBM AIX and IBM PowerVM VIOS.