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CVE-2026-45467 Microsoft CVE debrief

CVE-2026-45467 is a MEDIUM-severity vulnerability in Microsoft Office SharePoint, with a CVSS score of 4.6. The vulnerability, published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-45467) and last modified on [cveModifiedAt](https://nvd.nist.gov/vuln/detail/CVE-2026-45467), allows an authorized attacker to perform spoofing over a network due to improper neutralization of input during web page generation, also known as cross-site scripting (XSS).

Vendor
Microsoft
Product
Microsoft SharePoint Enterprise Server 2016
CVSS
MEDIUM 4.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-12
Advisory published
2026-06-09
Advisory updated
2026-06-12

Who should care

Administrators and users of Microsoft Office SharePoint Server, particularly those with versions 2016, 2019, and Subscription, should be aware of this vulnerability. The affected versions include [cpeCriteria](https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-06-09T12%3A30%3A41.000Z&lastModEndDate=2026-06-13T12%3A15%3A54.000Z).

Technical summary

The vulnerability is caused by improper neutralization of input during web page generation, allowing an authorized attacker to inject malicious scripts. The CVSS vector for this vulnerability is [cvssVector](https://nvd.nist.gov/vuln/detail/CVE-2026-45467), indicating a Network attack vector with Low complexity and privileges.

Defensive priority

MEDIUM

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to vulnerable SharePoint Server versions.
  • Implement proper input validation and sanitization for user-generated content.
  • Restrict access to sensitive areas of the SharePoint site for users with lower privileges.

Evidence notes

The CVE record [cve-org] and NVD detail [nvd] provide additional information on this vulnerability, including references to vendor advisories [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45467 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45467

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

  • CVE-2026-45467 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45467

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

Supplemental references

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.