CVE-2026-65660

HIGHCVSS 8.8/10Actively ExploitedEPSS 1.22%

Last modified

CVE-2026-65660 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.. CISA has confirmed active exploitation in the wild. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

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

Metrics

EPSS Probability
1.22%

67.4th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .

Weakness Enumeration

Affected Software

VendorProductVersions
MicrosoftSharepoint Server< 16.0.19725.20522
MicrosoftSharepoint Server2016
MicrosoftSharepoint Server2019

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-65660?
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
How severe is CVE-2026-65660?
CVE-2026-65660 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2026-65660?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST