Microsoft patches remote code execution flaws in SharePoint Server
Microsoft has issued security update KB5002863 for SharePoint Server Subscription Edition. The patch fixes seven remote code execution vulnerabilities, including CVE-2026-40357 and CVE-2026-33112. It updates the software to build 16.0.19725.20280. Attackers could exploit these flaws to run malicious code on vulnerable servers. The update also improves Quick Edit keyboard navigation and resolves page loading and database issues. It replaces the previous patch KB5002853 and requires an existing on-premises installation. Workflow Manager setups need an earlier update, KB5002799.
On-premises SharePoint servers faced ongoing threats from multiple remote code execution holes, forcing small IT teams to chase monthly patches amid daily fights over Teams sprawl and site permissions. This update closes those specific gaps but lays bare the hidden cost of hybrid environments: your limited bandwidth gets eaten by manual updates while cloud tenants get automatic protection, leaving ex-employee access risks and stale intranets unaddressed.
Analysis
Hybrid SharePoint farms are a support ticket black hole for your one-person team – this patch is just another bandage on a sinking ship. Inventory every on-premises server in your M365 tenancy this afternoon and commit to full cloud migration by year-end, no exceptions.
Source note
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