> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/cortex-xdr-3.x-rn/cortex-xdr-release-information/previous-maintenance-releases/xdr-collectors/xdr-collectors-151-major-317.md).

# XDR Collectors 1.5.1 (Major)

The XDR Collectors major release for Windows 1.5.1.2048 and Linux 1.5.1.1950 was released as part of the following releases of Cortex XDR:

* 3.15 on August 13, 2025.
* 3.16 on November 9, 2025
* 3.17 on January 25, 2026

The following table describes the changes integrated for this release:

| FEATURE/ISSUE | DESCRIPTION                                                                                                                       |
| ------------- | --------------------------------------------------------------------------------------------------------------------------------- |
| CPATR-32150   | An issue where after upgrading the XDRC Collectors caused connection failures when a proxy configuration was in use is now fixed. |


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