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.
CSIRTS triage
- What
- Code injection in SharePoint Server allows authorized attackers to perform spoofing.
- Who is affected
- Authorized users of SharePoint Server deployments over a network.
- Urgency
- Medium-high severity (CVSS 6.5) but not currently exploited; patch within standard cycle.
- Action
- Apply Microsoft security patches for CVE-2026-65660 when available.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65660
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-656600.74% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-65660 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
Recent advisories for Microsoft SharePoint Server
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-70326: Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacke…nvd · 2026-08-11
- highCVE-2026-70324: Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacke…nvd · 2026-08-11
- mediumCVE-2026-58639: Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacke…nvd · 2026-08-11
- highCVE-2026-63520: Microsoft SharePoint Server Remote Code Execution Vulnerabilitymsrc · 2026-08-11
- highCVE-2026-66805: Microsoft SharePoint Server Remote Code Execution Vulnerabilitymsrc · 2026-08-11
- mediumCVE-2026-62837: Microsoft SharePoint Server Information Disclosure Vulnerabilitymsrc · 2026-08-11
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