CVE-2026-16872

Q: How do I fix CVE-2026-16872?

Upgrade vios to 4.1.0.50 or later.

Q: Is CVE-2026-16872 being actively exploited?

Not that we know of. CVE-2026-16872 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.80% is the estimated probability that it will be exploited in the next 30 days. That is higher than 54% of all scored CVEs.

Q: How severe is CVE-2026-16872?

CVE-2026-16872 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-16872 affect?

Published advisories record a fix for vios (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

CRITICAL

9.8

CVSS v3

NVD

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-based buffer overflow.

CWE-121Stack-based Buffer Overflow

How to fix

Remediation Available

viosNVD

Affected:>= 4.1.0, < 4.1.0.50Fixed in:4.1.0.50CVE-2026-16872derived from NVD

Affected:>= 4.1.2.0, < 4.1.2.20Fixed in:4.1.2.20CVE-2026-16872derived from NVD

Affected:>= 4.1.1.0, < 4.1.1.30Fixed in:4.1.1.30CVE-2026-16872derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.80%probability of exploitation in 30 days

54thpercentile

Moderate risk: more likely to be exploited than 54% of all known CVEs.

References

Patch1

ibm.com

Related Vulnerabilities

Other CWE-121 (Stack-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2009-0927	High	8.8	97%	KEV	Fix
CVE-2020-10924	High	8.8	87%	-	-
CVE-2022-20705	Critical	10.0	80%	-	-

Common questions

How do I fix CVE-2026-16872?

Upgrade vios to 4.1.0.50 or later.

Is CVE-2026-16872 being actively exploited?

Not that we know of. CVE-2026-16872 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.80% is the estimated probability that it will be exploited in the next 30 days. That is higher than 54% of all scored CVEs.

How severe is CVE-2026-16872?

CVE-2026-16872 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-16872 affect?

Published advisories record a fix for vios (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-16872

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-22.