CVE-2026-16923

Q: How do I fix CVE-2026-16923?

Upgrade vios to 4.1.2.20 or later.

Q: Is CVE-2026-16923 being actively exploited?

Not that we know of. CVE-2026-16923 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.08% is the estimated probability that it will be exploited in the next 30 days. That is higher than 0% of all scored CVEs.

Q: How severe is CVE-2026-16923?

CVE-2026-16923 has a CVSS v3 base score of 7.0, rated high. 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-2026-16923 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.

HIGH

7.0

CVSS v3

NVD

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to gain elevated privileges due to improper privilege management.

CWE-269Improper Privilege Management

How to fix

Remediation Available

viosNVD

Affected:>= 4.1.2.0, < 4.1.2.20Fixed in:4.1.2.20CVE-2026-16923derived from NVD

Affected:>= 4.1.0, < 4.1.0.50Fixed in:4.1.0.50CVE-2026-16923derived from NVD

Affected:>= 4.1.1.0, < 4.1.1.30Fixed in:4.1.1.30CVE-2026-16923derived 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 VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.08%probability of exploitation in 30 days

0thpercentile

Low risk: more likely to be exploited than 0% of all known CVEs.

References

Patch1

ibm.com

Related Vulnerabilities

Other CWE-269 (Improper Privilege Management) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-12635	Critical	9.8	100%	-	Fix
CVE-2022-24637	Critical	9.8	99%	-	Fix
CVE-2017-5689	Critical	9.8	92%	KEV	Fix
CVE-2020-3243	Critical	9.8	88%	-	-
CVE-2024-21888	High	8.8	87%	-	-
CVE-2022-0441	Critical	9.8	85%	-	Fix

Common questions

How do I fix CVE-2026-16923?

Upgrade vios to 4.1.2.20 or later.

Is CVE-2026-16923 being actively exploited?

Not that we know of. CVE-2026-16923 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.08% is the estimated probability that it will be exploited in the next 30 days. That is higher than 0% of all scored CVEs.

How severe is CVE-2026-16923?

CVE-2026-16923 has a CVSS v3 base score of 7.0, rated high. 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-2026-16923 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-2026-16923

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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 2026-08-24.