The product group released the August 2026 Cumulative Update for Office Online Server.
The KB article for August 2026 CU will be available at the following Location in a couple of hours:
- KB 5002895 – August 2026 Update for Office Online Server
The download for August 2026 CU is available through the following link:
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Hello Stefan,
the Download page offers 2 files with the same file name, but when downloading one is named mso2016-kb5002897-fullfile-x64-glb.exe. Maybe you can pass that on?
As always, thank you for maintaining your blog!
Sven
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Same here
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Hello Stefan,
there is a mess with this update. It says KB 5002895 but this KB was for June 2026. There is no summary and description of download link says Download security update for Microsoft SharePoint Server 2016 Language Pack (KB5002895)…
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June CU was KB 5002875 not 5002895
You are correct, the description on the KB is wrong but the referenced fix is correct.
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File contents appear identical.
SHA256 File hash is the same for both files.
Is it correct, I only need to install one of the files?
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Yes. There is only one file.
It seems it got uploaded twice by accident.
Cheers,
Stefan
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And document preview from a Search Center stops working when document is found on a different URL then the search center is. Looks like a change for iframe usage. From OOS or SharePoint Side?
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Hi Matthias, in this case I would recommend to open a ticket with Microsoft support.
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Solution is to add all WA URLs in the Farm Config:
$f = Get-SPFarm
$f.AddGenericAllowedListValue(“AllowIframeAppAuthorizePageDomains”, “wa.url”)
$f.Update()
Found in the discussion from the July Update by Paul Aeschlimann, Solution from Geoff