How severe is CVE-2026-4433?

CVE-2026-4433 has a CVSS 4.0 base score of 1.9, rated low severity.

Is CVE-2026-4433 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4433?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-4433 have an EU (EUVD) identifier?

Yes. CVE-2026-4433 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15025.

When was CVE-2026-4433 published?

CVE-2026-4433 was published on 2026-03-24 and last updated on 2026-06-17.

CVE-2026-4433

CVE-2026-4433 is a low-severity vulnerability with a CVSS 4.0 base score of 1.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-16.

Key facts

Severity: Low (CVSS 4.0 base score 1.9)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-15025
Weakness: CWE-16
Published: 2026-03-24
Last modified: 2026-06-17

Description

An SSH misconfigurations exists in Tenable OT that led to the potential exfiltration of socket, port, and service information via the ostunnel user and GatewayPorts. This could be used to potentially glean information about the underlying system and give an attacker information that could be used to attempt to compromise the host.

Frequently asked questions

What is CVE-2026-4433?: An SSH misconfigurations exists in Tenable OT that led to the potential exfiltration of socket, port, and service information via the ostunnel user and GatewayPorts. This could be used to potentially glean information about the underlying system and give an attacker information that could be used to attempt to compromise the host.
How severe is CVE-2026-4433?: CVE-2026-4433 has a CVSS 4.0 base score of 1.9, rated low severity.
Is CVE-2026-4433 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-4433?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4433 have an EU (EUVD) identifier?: Yes. CVE-2026-4433 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15025.
When was CVE-2026-4433 published?: CVE-2026-4433 was published on 2026-03-24 and last updated on 2026-06-17.

References

https://www.tenable.com/security/tns-2026-9

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