Source: https://support.microsoft.com/en-us/topic/may-11-2021-kb5003228-security-only-update-20e83cb3-5cab-4729-b4d4-5295d29bfdb8
Direct download links for KB5003228 (ESU only) MSU file from Microsoft Update Catalog:
Download KB5003228 MSU for Windows 7 32-bit (x86) - 23.7 MB
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Source: https://support.microsoft.com/en-us/topic/february-9-2021-kb4601363-security-only-update-a37e890f-974f-7bdb-2664-b627e9436b06
Direct download links for KB4601363 (ESU only) MSU file from Microsoft Update Catalog:
:ar: Download KB4601363 MSU for Windows 7 32-bit (x86) - 20.9 MB
...
Source: https://support.microsoft.com/en-us/help/4586827
Direct download links for KB4586805 (ESU only) MSU file from Microsoft Update Catalog:
:ar: Download KB4586805 MSU for Windows 7 32-bit (x86) - 28.6 MB
:ar: Download KB4586805 MSU for Windows 7 64-bit (x64) - 45.6 MB
Source: https://support.microsoft.com/en-us/help/4571719
Direct download links for KB4565539 (ESU only) MSU file from Microsoft Update Catalog:
:ar: Download KB4565539 MSU for Windows 7 32-bit (x86) - 32.0 MB
:ar: Download KB4565539 MSU for Windows 7 64-bit (x64) - 50.1 MB