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CVE-2026-48562 Microsoft CVE debrief

CVE-2026-48562 is a MEDIUM severity vulnerability in Microsoft Office SharePoint, with a CVSS score of 4.6. The vulnerability is caused by improper neutralization of input during web page generation, allowing an authorized attacker to perform spoofing over a network. The vulnerability was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-48562) and details can be found on [nvd](https://nvd.nist.gov/vuln/detail/CVE-2026-48562).

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

Users of Microsoft Office SharePoint Server, particularly those with administrative privileges, should be aware of this vulnerability and take necessary precautions.

Technical summary

The vulnerability is caused by improper neutralization of input during web page generation, allowing an authorized attacker to perform spoofing over a network. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

Defensive priority

MEDIUM

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to vulnerable systems.
  • Restrict access to SharePoint Server to authorized users only.
  • Monitor SharePoint Server logs for suspicious activity.

Evidence notes

The vulnerability is described in [ref-4](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48562), a vendor advisory from Microsoft.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-48562 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-48562

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

  • CVE-2026-48562 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-48562

    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.