Tenable Operation Technology up to 4.2.40 SSH config

Summaryinfo

A vulnerability has been found in Tenable Operation Technology up to 4.2.40 and classified as critical. The impacted element is an unknown function of the component SSH. Performing a manipulation results in config. This vulnerability is reported as CVE-2026-4433. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Tenable Operation Technology up to 4.2.40. It has been classified as critical. This affects an unknown part of the component SSH. The manipulation with an unknown input leads to a config vulnerability. CWE is classifying the issue as CWE-16. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at tenable.com. This vulnerability is uniquely identified as CVE-2026-4433 since 03/19/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/29/2026). The attack technique deployed by this issue is T1592.004 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Tenable

Name

• Operation Technology

Version

• 4.2.0
• 4.2.1
• 4.2.2
• 4.2.3
• 4.2.4
• 4.2.5
• 4.2.6
• 4.2.7
• 4.2.8
• 4.2.9
• 4.2.10
• 4.2.11
• 4.2.12
• 4.2.13
• 4.2.14
• 4.2.15
• 4.2.16
• 4.2.17
• 4.2.18
• 4.2.19
• 4.2.20
• 4.2.21
• 4.2.22
• 4.2.23
• 4.2.24
• 4.2.25
• 4.2.26
• 4.2.27
• 4.2.28
• 4.2.29
• 4.2.30
• 4.2.31
• 4.2.32
• 4.2.33
• 4.2.34
• 4.2.35
• 4.2.36
• 4.2.37
• 4.2.38
• 4.2.39
• 4.2.40

License

• free

CPE 2.3info

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CPE 2.2info

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CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

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Timelineinfo

Sourcesinfo

Entryinfo

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