CVE-2026-65660

high

Description

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

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65660

https://blog.previdian.com/cve-2026-65660-previdian-observes-two-stage-sharepoint-exploitation-attempts/

https://www.securityweek.com/microsoft-sharepoint-flaw-cve-2026-65660-now-exploited-in-attacks/

https://thehackernews.com/2026/09/sharepoint-rce-and-mikrotik-routeros.html

https://www.cisa.gov/news-events/alerts/2026/09/25/cisa-adds-two-known-exploited-vulnerabilities-catalog

https://www.bleepingcomputer.com/news/security/cisa-warns-of-sharepoint-wso2-adobe-commerce-flaws-exploited-in-attacks/

https://securityaffairs.com/199777/hacking/u-s-cisa-adds-microsoft-sharepoint-and-mikrotik-routeros-flaws-to-its-known-exploited-vulnerabilities-catalog.html

https://www.tenable.com/blog/microsofts-august-2026-patch-tuesday-addresses-398-cves-cve-2026-68820

https://github.com/ShadowForge-Cyber/CVE-2026-65660-Poc

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-65660

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-56431

Details

Source: Mitre, NVD

Published: 2026-08-11

Updated: 2026-09-26

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H