Werk #18536: MAC addresses are reported correctly for Windows

Component

Checks & agents

Title

MAC addresses are reported correctly for Windows

Date

Oct 10, 2025

Level

Trivial Change

Class

Bug Fix

Compatibility

Incompatible - Manual interaction might be required

Checkmk versions & editions

2.5.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.4.0p16 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p40 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Previously, the physical MAC address of the network interface was reported incorrectly: instead of six hexadecimal values, eight were returned, with the last two always being zeros.

This issue has been fixed in this release. Due to the change in reported values, rediscovery of certain network interface services may be required.

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