dbcve.org
Sharepoint ServerApplication · Microsoft

CVE-2025-49712

HIGH · 8.8 CVSS v3.1 Published 2025-08-12
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

This is a deserialization vulnerability in Microsoft Office SharePoint where untrusted data is deserialized without proper validation, allowing an authenticated attacker to achieve remote code execution over the network. The high CVSS score (8.8) reflects the serious impact of arbitrary code execution combined with network accessibility.

MitigationApply the Microsoft security update for SharePoint as soon as it becomes available, and ensure network segmentation and least-privilege access controls are in place to limit the attack surface for authorized users.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Sharepoint ServerApplication
Affected:= 2016= 2019

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check SharePoint Server version via PowerShell
    Open SharePoint Management Shell and run: (Get-SPFarm).BuildVersion.ToString()
    Affected if version equals 16.x (SharePoint 2016) or 16.x (SharePoint 2019)
  2. Retrieve detailed product information
    Run: Get-SpServer -Identity $env:COMPUTER | Select-Object -Property Version, Build, Type
    Affected if Version shows 16.0.x.x corresponding to SharePoint 2016 or 2019
  3. Confirm SharePoint edition
    Run: (Get-SPFarm).Products to list installed SharePoint products
    Affected if Output includes SharePoint Server 2016 or SharePoint Server 2019
  4. Verify build number against known affected builds
    Run: (Get-SPFarm).BuildVersion and compare the full version string to Microsoft security bulletin
    Affected if Build falls within the vulnerable build ranges for 2016 or 2019

A system is affected if it runs SharePoint Server 2016 or SharePoint Server 2016 and an authenticated user can access the deserialization endpoint.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the Microsoft security update for SharePoint as soon as it becomes available, and ensure network segmentation and least-privilege access controls are in place to limit the attack surface for authorized users.

Fix this in Sharepoint Server Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing12.0 h
  • Review / QA6.0 h
30.0 hours of engineering $5,120
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An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,192.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-49712 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data