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CVE-2026-16894

IBM Aix remote code execution

9.8 CRITICALEPSS 0.80%
  1. Published19 Aug 2026

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to a stack buffer overflow.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

IBM Vios≥ 4.1.0 < 4.1.0.50 · ≥ 4.1.1.0 < 4.1.1.30 · ≥ 4.1.2.0 < 4.1.2.20
IBM Aix≥ 7.2.5 ≤ 7.2.5.212 · ≥ 7.3.2 ≤ 7.3.2.5 · ≥ 7.3.3 ≤ 7.3.3.2 · ≥ 7.3.4 ≤ 7.3.4.1

Remediation

Fixed in
IBM Vios≥ 4.1.0.50

References

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Frequently asked

Is CVE-2026-16894 being actively exploited?

CVE-2026-16894 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.80%.

How severe is CVE-2026-16894?

CVE-2026-16894 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.80% probability of exploitation.

Which products are affected by CVE-2026-16894?

Affected products include IBM Vios, IBM Aix.

How do I fix CVE-2026-16894?

Upgrade affected software to a fixed version, for example IBM Vios 4.1.0.50 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-16894 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.