CVE-2026-65660

Analyzed
Published: 11 Aug 2026, 17:04
Last modified:25 Sept 2026, 19:58

Vulnerability Summary

Overall Risk (default)
medium
35/100
CVSS Score
8.8 HIGH
v3.1 (cve.org)
EPSS Score
1.22% LOW
1% probability +0.03%
KEV
Listed
CISA
1 listing
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

11 Aug 2026, 17:04
Published
Vulnerability first disclosed
25 Sept 2026, 00:00
Added to CISA KEV
Microsoft SharePoint Code Injection Vulnerability
25 Sept 2026, 19:58
Last Modified
Vulnerability information updated
28 Sept 2026, 00:00
CISA Remediation Due
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Description

Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

CVSS Metrics

  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 1.22%• Percentile: 67%

Techniques & Countermeasures

  • CWE-94•Improper Control of Generation of Code ('Code Injection')

    The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Affected Systems

  • microsoft•microsoft sharepoint enterprise server 2016

    ≥ 16.0.0, < 16.0.5565.1001

  • microsoft•microsoft sharepoint server 2019

    ≥ 16.0.0, < 16.0.10417.20198

  • microsoft•microsoft sharepoint server subscription edition

    ≥ 16.0.0, < 16.0.19725.20522

  • microsoft•sharepoint_server

    < 16.0.19725.20522 | 2016 | 2019

References (3)