CVE-2026-16822

Q: How do I fix CVE-2026-16822?

Upgrade vios to 4.1.2.20 or later.

Q: Is CVE-2026-16822 being actively exploited?

Not that we know of. CVE-2026-16822 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.20% is the estimated probability that it will be exploited in the next 30 days. That is higher than 10% of all scored CVEs.

Q: How severe is CVE-2026-16822?

CVE-2026-16822 has a CVSS v3 base score of 9.3, 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-2026-16822 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

9.3

CVSS v3

NVD

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to impersonate the TNC policy server and modify traffic due to improper certificate validation.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

viosNVD

Affected:>= 4.1.2.0, < 4.1.2.20Fixed in:4.1.2.20CVE-2026-16822derived from NVD

Affected:>= 4.1.1.0, < 4.1.1.30Fixed in:4.1.1.30CVE-2026-16822derived from NVD

Affected:>= 4.1.0, < 4.1.0.50Fixed in:4.1.0.50CVE-2026-16822derived 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

ScopeChanged

Impact

ConfidentialityLow

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.20%probability of exploitation in 30 days

10thpercentile

Low risk: more likely to be exploited than 10% of all known CVEs.

References

Patch1

ibm.com

Related Vulnerabilities

Other CWE-295 (Improper Certificate Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-4000	Low	3.7	100%	-	Fix
CVE-2020-0601	High	8.1	89%	KEV	Fix
CVE-2009-3555	Critical	9.8	87%	-	Fix
CVE-2022-26923	High	8.8	84%	KEV	Fix
CVE-2023-27823	Critical	9.8	53%	-	-
CVE-2022-42979	High	8.8	24%	-	-

Common questions

How do I fix CVE-2026-16822?

Upgrade vios to 4.1.2.20 or later.

Is CVE-2026-16822 being actively exploited?

Not that we know of. CVE-2026-16822 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.20% is the estimated probability that it will be exploited in the next 30 days. That is higher than 10% of all scored CVEs.

How severe is CVE-2026-16822?

CVE-2026-16822 has a CVSS v3 base score of 9.3, 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-2026-16822 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-2026-16822

Markdown

[![CVE-2026-16822](https://tridentstack.com/cve/badge/CVE-2026-16822.svg)](https://tridentstack.com/cve/CVE-2026-16822)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-16822"><img src="https://tridentstack.com/cve/badge/CVE-2026-16822.svg" alt="CVE-2026-16822"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

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.