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.. _mozilla_projects_nss_nss_3_73_release_notes:
NSS 3.73 release notes
======================
`Introduction <#introduction>`__
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Network Security Services (NSS) 3.73 was released on **1 December 2021**.
**This release contains an important security fix for CVE-2021-43527:**
`Distribution Information <#distribution_information>`__
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The HG tag is NSS_3_73_RTM. NSS 3.73 requires NSPR 4.32 or newer.
NSS 3.73 source distributions are available on ftp.mozilla.org for secure HTTPS download:
- Source tarballs:
Other releases are available :ref:`mozilla_projects_nss_releases`.
.. _changes_in_nss_3.73:
`Changes in NSS 3.73 <#changes_in_nss_3.73>`__
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`Compatibility <#compatibility>`__
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NSS 3.73 shared libraries are backwards-compatible with all older NSS 3.x shared
libraries. A program linked with older NSS 3.x shared libraries will work with
this new version of the shared libraries without recompiling or
relinking. Furthermore, applications that restrict their use of NSS APIs to the
functions listed in NSS Public Functions will remain compatible with future
versions of the NSS shared libraries.
`Feedback <#feedback>`__
------------------------
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Bugs discovered should be reported by filing a bug report on