← ← Back to all products
NetBackup Appliance OS
Active
Cloud & PlatformsLatest Version: 5.5.0.1 MR1Latest Release: Jul 31, 2025
NetBackup Appliance OS is the operating system powering Veritas NetBackup backup appliances.
Support summary
NetBackup Appliance OS currently has supported cycles. Track the next EOL date and validate upgrades before your change window.
What do EOL and support statuses mean?Next EOL
No announced EOL date is currently listed.
Supported cycles
2
0 lts
Versions
11
Latest Version
5.5.0.1 MR1
Active Support
2
EOL
9
Lifecycle Timeline
Today ↓
5.5
5.5
5.3
5.3
5.1
5.1
5.0
5.0
4.1
4.1
4.0
4.0
3.3
3.3
3.2
3.2
3.1
3.1
3.0
3.0
Active SupportSecurity SupportEOL
Versions
| Release | Release Date | Active Support | EOL | Latest Version | LTS | Status |
|---|---|---|---|---|---|---|
| 5.5 | Jul 31, 2025 | Yes | No | 5.5.0.1 MR1 | No | Active |
| 5.3 | Nov 27, 2023 | Yes | No | 5.3.0.1 MR4 | No | Active |
| 5.1 | Feb 8, 2023 | No | Sep 8, 2025 | 5.1.1 MR5 | No | EOL |
| 5.0 | Apr 25, 2022 | No | Mar 28, 2025 | 5.0.0.1 MR5 | No | EOL |
| 4.1 | Jul 19, 2021 | No | Jun 7, 2024 | 4.1.0.1 MR5 | No | EOL |
| 4.0 | Mar 1, 2021 | No | Jan 1, 2024 | 4.0.0.1 MR4 | No | EOL |
| 3.3 | Oct 5, 2020 | No | Jul 29, 2024 | 3.3.0.2 MR2 | No | EOL |
| 3.2 | Nov 4, 2019 | No | Jun 28, 2023 | 3.2 | No | EOL |
| 3.1 | Sep 26, 2017 | No | Jun 28, 2022 | 3.1.2 | No | EOL |
| 3.0 | Dec 4, 2016 | No | Oct 1, 2020 | 3.0 | No | EOL |
| 2.7 | Dec 6, 2015 | No | Oct 1, 2020 | 2.7.3 | No | EOL |
Data sources
Frequently Asked Questions
Which versions of NetBackup Appliance OS have reached end of life?
The following NetBackup Appliance OS versions have reached end of life and no longer receive security updates: 5.1, 5.0, 4.1, 4.0, 3.3, 3.2, 3.1, 3.0 (and 1 more). It is recommended to upgrade to a supported version.
Is it safe to continue using NetBackup Appliance OS 5.1?
NetBackup Appliance OS 5.1 has reached end of life and no longer receives security patches or bug fixes. Continuing to use it may expose your systems to known vulnerabilities. We strongly recommend upgrading to a supported version.
What is the latest version of NetBackup Appliance OS?
The latest version of NetBackup Appliance OS is 5.5.0.1 MR1, released in the 5.5 release cycle.
How many versions of NetBackup Appliance OS are currently supported?
NetBackup Appliance OS currently has 2 actively supported version(s): 5.5, 5.3.
When does NetBackup Appliance OS 5.5 reach end of life?
NetBackup Appliance OS 5.5 does not have a specific end-of-life date announced yet.
What should I do when NetBackup Appliance OS reaches end of life?
When a NetBackup Appliance OS version reaches end of life, you should: 1) Plan your migration to a supported version as soon as possible. 2) Review the release notes for breaking changes. 3) Test your applications thoroughly in a staging environment. 4) Update your dependencies to ensure compatibility with the new version.