Is itCheck something

No. CVE-2026-65660

A flaw in Microsoft SharePoint lets attackers run code

Being used now

Yes. Attackers are using this right now.

Organizations that run their own SharePoint servers.

What to do

Run Microsoft's latest SharePoint security update.

Confirmed in attacksSep 25, 2026
ProductMicrosoft SharePoint
GitHub repos2
Attack likelihood, next 30 days8.2%

Attack likelihood is EPSS, a daily estimate from FIRST.org of how likely this bug is to be used in attacks in the next 30 days.

The official description

Microsoft SharePoint contains a code injection vulnerability which could allow an authorized attacker to execute code over a network.

For your tech helper or AI assistant

A read-only checklist. Paste it into Claude, ChatGPT or a coding agent; it only looks and changes nothing.

Read-only check, change nothing, send nothing anywhere.
Is Microsoft SharePoint (CVE-2026-65660) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2026-65660. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.
Download playbook (.md)

Code on GitHub

Repos named after this bug. Some are scanners or write-ups, some are working attack code. Do not run them on a machine you care about.

Sources