CVE-2026-62917: Microsoft SharePoint Server Spoofing Vulnerability
Improper input validation in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
CSIRTS triage
- What
- Improper input validation in SharePoint allows authorized attackers to perform spoofing over network.
- Who is affected
- Authenticated users with access to vulnerable SharePoint deployments.
- Urgency
- Medium priority; CVSS 4.6 spoofing vulnerability requiring prior authentication.
- Action
- Apply SharePoint Server security updates when available from Microsoft.
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-2026-62917
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-2026-629170.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-62917 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
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