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CVE-2026-62917 Microsoft CVE debrief

Microsoft SharePoint Server Spoofing Vulnerability debrief. The vulnerability is a spoofing vulnerability in Microsoft SharePoint Server. An authorized attacker can perform spoofing over a network due to improper input validation. SharePoint Server administrators and security teams should assess exposure and apply patches as necessary. The CVE record and NVD entry provide details on the vulnerability. The vendor, Microsoft, has provided an advisory for the vulnerability. This vulnerability requires verification of versions and application of patches to prevent spoofing.

Vendor
Microsoft
Product
Microsoft SharePoint Enterprise Server 2016
CVSS
MEDIUM 4.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-10-08
Advisory published
2026-08-11
Advisory updated
2026-10-08

Who should care

SharePoint Server administrators and security teams should assess exposure and apply patches as necessary. This vulnerability requires verification of versions and application of patches to prevent spoofing. The CVE record and NVD entry provide details on the vulnerability. The vendor, Microsoft, has provided an advisory for the vulnerability. Defenders should verify SharePoint Server versions and apply patches as a

Why it matters

The CVE-2026-62917 vulnerability in Microsoft SharePoint Server requires verification of versions and application of patches to prevent spoofing. SharePoint Server administrators and security teams should assess exposure and apply patches as necessary.

  • Verify SharePoint Server versions and apply patches to prevent spoofing
  • Monitor SharePoint Server logs for suspicious activity
  • Review and update SharePoint Server configurations to ensure proper input validation

Technical summary

The vulnerability is a spoofing vulnerability in Microsoft SharePoint Server. An authorized attacker can perform spoofing over a network due to improper input validation. This vulnerability requires verification of versions and application of patches to prevent spoofing. SharePoint Server administrators and security teams should assess exposure and apply patches as necessary.

Defensive priority

Medium priority for SharePoint administrators

Recommended defensive actions

  • Review and apply the Microsoft advisory for CVE-2026-62917
  • Verify SharePoint Server versions and apply patches as necessary
  • Monitor SharePoint Server logs for suspicious activity

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. The vendor, Microsoft, has provided an advisory for the vulnerability. Evidence is limited to public CVE and NVD information. Defenders should verify SharePoint Server versions and apply patches as necessary. The vulnerability is a spoofing vulnerability in Microsoft SharePoint Server due to improper input validation.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-62917 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-62917

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-62917 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-62917

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Microsoft SharePoint Server Spoofing Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/62xxx/CVE-2026-62917.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62917

    Supplemental source - vendor-advisory, patch

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.