CVE-2026-65660 Microsoft SharePoint Server Spoofing Vulnerability
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
CRITICAL
CISA KEV
ACTIVELY EXPLOITED
Severity & confidence
Source severitylow
Platform severitycritical
Confidenceconfirmed
Exploitationactively exploited
CVSS-
Affected
Vendorsmicrosoft
ProductsSharePoint
Reporting sources (3)
Microsoft Security Response Center - Update Guide
CISA - Known Exploited Vulnerabilities
CISA - Cybersecurity Advisories
๐ฏ Why should I care?
- On the CISA Known Exploited Vulnerabilities list.
- Credible sources report active exploitation in the wild.
Timeline & provenance
Published2026-08-11T07:00:00
Last updated2026-10-21T04:59:26
Ingested2026-08-21T04:40:14
FreshnessNEAR-REAL-TIME
Threat typevulnerability
Recommended action
No recommended action published with this item - review the original source.
Next steps
- Identify affected systems in your environment.
- Apply the vendor patch or mitigation guidance.
- Review logs for indicators described in the advisory.
- Follow the affected vendor/product to track updates.
Confidence explanation
This object is reported by 3 independent sources.
Source type: vendor ยท Original: Microsoft Security Response Center - Update Guide
