Tenable Network Monitor 2026 Release Notes

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These release notes are listed in reverse chronological order. To jump to a place in the release notes, use the list to the right.

Tenable Network Monitor 6.5.4 - 2026-05-14

Tenable Network Monitor 6.5.4 is now available, fixing an issue with unsigned RH9/OL9 RPM packages and correcting a binary update truncation error that could cause upgrade failures.

For instructions on how to install or upgrade Tenable Network Monitor, see:

Note: This release includes a fix for a potential vulnerability. For more information, see the Tenable Product Security Advisory.

The following are security updates included in Tenable Network Monitor 6.5.4:

  • Support for openssl-3.0.20

  • Support for curl 8.18.0

  • Support for sqlite3 3.49.1

  • Support for handlebars 4.7.9

  • Support for expat 2.7.5

  • Support for dpdk 25.07

Tenable Network Monitor 6.5.4 includes the following bug fixes:

  • Fixed an issue where Tenable Network Monitor RPMs for RH9/OL9 packages were not properly digitally signed, ensuring that users can verify the authenticity and integrity of the software during installation.

  • Fixed an issue where Tenable Network Monitor incorrectly truncated binary updates when the download chunk size exceeded 1 MB. This truncation resulted in file corruption and MD5 hash mismatches, preventing the software from upgrading successfully.

  • Fixed a synchronization issue where Tenable Network Monitor failed to correctly update plugin sets when managed by Tenable Security Center over slow links, ensuring the latest detection capabilities are applied.

Support is available for the following platforms:

  • Red Hat Linux ES 7 (RH 7.0 through 7.9) 64-bit

  • Red Hat Linux ES 8 / CentOS 8 (RH 8.2 through 8.10) 64-bit

    Note: This RPM is also supported in Oracle Linux 8 in Red Hat Compatible Kernel (RHCK) mode.

  • Red Hat Linux ES 9 (9.0 through 9.4) 64-bit

    Note: For all versions of Red Hat Linux ES and CentOS, Tenable Network Monitor requires that you have systemd and firewalld on your system.

  • Microsoft Windows 10, Server 2012, Server 2016, Server 2019, and Server 2022 (all 64-bit)

    Note: Tenable Network Monitor requires Microsoft Visual C++ Redistributable for Visual Studio 2015, 2017 and 2019. You must download the specific package vc_redist.x64.exe from the Microsoft downloads site.

Tenable Network Monitor 6.5.3 - 2026-01-27

Tenable Network Monitor 6.5.3 is now available, updating the user interface to reflect the product's rebrand from Nessus Network Monitor (NNM) to Tenable Network Monitor (TNM).

For instructions on how to install or upgrade Tenable Network Monitor, see:

Note: This release includes a fix for a potential vulnerability. For more information, see the Tenable Product Security Advisory.

The following are changed functionality and performance enhancements included in Tenable Network Monitor 6.5.3:

  • Updated the user interface to reflect the rebranding of Nessus Network Monitor (NNM) to Tenable Network Monitor (TNM).

  • Enhancements to telemetry data.

  • Tenable Network Monitor does not require a proxy username or password for transparent network proxies.

For more information about the features and functionality supported in this release, see theTenable Network Monitor 6.5.x User Guide and the Tenable Network Monitor Deployment Guide.

The following are security updates included in Tenable Network Monitor 6.5.3:

  • Support for libxml2/2.13.9

  • Support for libxslt/1.1.45

  • Support for expat/2.7.3

  • Support for c-ares 1.34.6

  • Support for curl 8.17.0

  • Support for sqlite3 3.49.0

Tenable Network Monitor 6.5.3 includes the following bug fixes:

  • Tenable Network Monitor on Windows now correctly detects the proxy service during upgrades from Tenable One Vulnerability Management or a standard feed, which prevents an error message stating that the software update cannot include engine updates.

  • Updated the password change functionality to require users to provide their current password before making updates, which prevents unauthorized account takeovers if a session is compromised.

  • Tenable Network Monitor now prevents multiple simultaneous plugin download attempts when a connection to Tenable Security Center exceeds the maximum timeout.

Support is available for the following platforms:

  • Red Hat Linux ES 7 (RH 7.0 through 7.9) 64-bit

  • Red Hat Linux ES 8 / CentOS 8 (RH 8.2 through 8.10) 64-bit

    Note: This RPM is also supported in Oracle Linux 8 in Red Hat Compatible Kernel (RHCK) mode.

  • Red Hat Linux ES 9 (9.0 through 9.4) 64-bit

    Note: For all versions of Red Hat Linux ES and CentOS, Tenable Network Monitor requires that you have systemd and firewalld on your system.

  • Microsoft Windows 10, Server 2012, Server 2016, Server 2019, and Server 2022 (all 64-bit)

    Note: Tenable Network Monitor requires Microsoft Visual C++ Redistributable for Visual Studio 2015, 2017 and 2019. You must download the specific package vc_redist.x64.exe from the Microsoft downloads site.