CVE-2026-19437: CWE-787 Out-of-bounds Write in IBM AIX
Description
CVE-2026-19437 is a high-severity vulnerability in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1 involving an out-of-bounds write (buffer overflow) that could allow a remote attacker to execute arbitrary code without privileges or user interaction.
CVSS v3.1
Score 8.1high
Affected software
IBM
AIX
IBM
PowerVM VIOS
cpe:2.3:a:ibm:aix:7.2:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.2.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.3:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.3.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:powervm_vios:4.1:*:*:*:*:*:*:*cpe:2.3:a:ibm:powervm_vios:4.1.0:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-787) affects IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1. It is caused by an out-of-bounds write (buffer overflow) condition that could be exploited remotely to execute arbitrary code. The CVSS 3.1 base score is 8.1, indicating high severity, with attack vector network, high attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation could allow a remote attacker to execute arbitrary code on affected systems, potentially leading to full system compromise including unauthorized disclosure, modification, or destruction of data and disruption of service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, restrict network access to affected systems and monitor for unusual activity related to this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-08-10T12:48:21.273Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a877e39acd9273b493410a4
Added to database: 08/20/2026, 22:22:49 UTC
Last enriched: 09/10/2026, 19:32:52 UTC
Last updated: 10/04/2026, 18:53:14 UTC
Views: 73
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.