Should we patch SQL Server immediately even if it's not internet-facing?

Yes. The zero-day requires only an authorized low-privilege account on the network, not internet exposure. Any internal network attacker or compromised endpoint with SQL access is a viable threat vector.

Does the Office RCE require the user to open the file?

No. CVE-2026-26110 and CVE-2026-26113 are triggered via the Outlook preview pane. The user only needs to click the email to preview it.

Is Excel CVE-2026-26144 exploitable in standard configurations?

Exploitation requires Copilot Agent mode to be enabled and the workbook to contain data the agent can exfiltrate. Organizations with Copilot disabled are not at risk from this specific CVE.

Where can I find the official Microsoft advisory?

All CVEs are documented on the Microsoft Security Response Center at msrc.microsoft.com under the March 2026 security update guide.

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