# CVE-2026-65660: Microsoft SharePoint code injection

Source: https://junglewise.ai/threats/cve-2026-65660-microsoft-sharepoint-code-injection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-11. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-65660 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2026-08-11

Microsoft SharePoint, an enterprise collaboration and document management platform, contains a code injection flaw that allows authenticated attackers to execute arbitrary code on the server over the network. Exploitation could lead to complete system compromise, data theft, and operational disruption across an organization's document and collaboration infrastructure.

Technologies: [Microsoft SharePoint](https://junglewise.ai/threats/technologies/sharepoint). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-65660 exploited in the wild?** Yes. CVE-2026-65660 is known to be exploited in the wild, first recorded on 25 September 2026. Treat it as urgent.

**How severe is CVE-2026-65660?** Critical severity, with a CVSS score of 8.8, published 11 August 2026.

**Which products and versions are affected?** Microsoft SharePoint.

**Is there a fix for CVE-2026-65660?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-65660 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-65660?** Check whether you run Microsoft SharePoint. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This vulnerability is a code injection issue in Microsoft SharePoint that permits an authenticated attacker with network access to inject and execute malicious code on the affected server. The vulnerability requires valid credentials but no user interaction. An attacker exploiting this flaw can achieve remote code execution (RCE) with the privileges of the SharePoint application. The flaw has been confirmed as exploited in the wild. Patch availability and detailed remediation guidance should be obtained from Microsoft's security advisory.

## Affected products

- Microsoft SharePoint

## Timeline

- 2026-09-25: disclosed
- exploited: confirmed exploited in the wild

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