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CVE-2026-4433

MEDIUMCVSS 4.3/10EPSS 0.25%

Last modified

CVE-2026-4433 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
4.3/10

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

CVSS 4.0
1.9/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.25%

16.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
TenableOperational Technology Exposure>= 3.18.58, < 4.2.40

References

Timeline

Published
Last Modified
Status
Analyzed

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 score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.
How do I fix CVE-2026-4433?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST