Skip to content
Noroxi
NVD / CVE Program· CNA microsoft

CVE-2025-21400: Microsoft SharePoint Server Remote Code Execution Vulnerability

HighCVSS 8.0 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Plan (action score 42/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 34.2% (FIRST EPSS); higher than 98.4% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: Microsoft SharePoint Enterprise Server 2016 16.0.5487.1000; Microsoft SharePoint Server 2019 16.0.10416.20050; Microsoft SharePoint Server Subscription Edition 16.0.17928.20396.

Add it to your regular patch cycle. Upgrade to Microsoft SharePoint Enterprise Server 2016 16.0.5487.1000; Microsoft SharePoint Server 2019 16.0.10416.20050; Microsoft SharePoint Server Subscription Edition 16.0.17928.20396 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Published
Feb 11, 2025
Updated
Jun 17, 2026
EPSS
34.2% · 98th percentile

Report tools

JSON

Action score

42

Plan

Add it to your regular patch cycle.

CVSS
32 / 40 · 8.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
10 / 30 · 34.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
8.0
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-21400

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for microsoft records
Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoftsharepoint server

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft Microsoft SharePoint Enterprise Server 2016

    • 16.0.0 and later · before 16.0.5487.1000affected

  • Microsoft Microsoft SharePoint Server 2019

    • 16.0.0 and later · before 16.0.10416.20050affected

  • Microsoft Microsoft SharePoint Server Subscription Edition

    • 16.0.0 and later · before 16.0.17928.20396affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft sharepoint serverbefore 16.0.17928.20396
  • microsoft sharepoint server2016
  • microsoft sharepoint server2019

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-53770Microsoft SharePoint Server Remote Code Execution VulnerabilityKEV
    99Now
  • CVE-2023-29357Microsoft SharePoint Server Elevation of Privilege VulnerabilityKEV
    99Now
  • CVE-2025-49704Microsoft SharePoint Remote Code Execution VulnerabilityKEV
    95Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-21348Jan 14, 2025 · Microsoft SharePoint Server Remote Code Execution Vulnerability
    29Monitor
  • ← EarlierCVE-2025-21393Jan 14, 2025 · Microsoft SharePoint Server Spoofing Vulnerability
    25Monitor
  • Later →CVE-2025-29976May 13, 2025 · Microsoft SharePoint Server Elevation of Privilege Vulnerability
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Microsoft SharePoint Enterprise Server 201616.0.5487.1000 · KB5002685Microsoft (MSRC)
Microsoft SharePoint Server 201916.0.10416.20050 · KB5002678Microsoft (MSRC)
Microsoft SharePoint Server Subscription Edition16.0.17928.20396 · KB5002681Microsoft (MSRC)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-49701147 days apartMicrosoft SharePoint Remote Code Execution Vulnerability
    35Monitor
  • CVE-2026-58277518 days apartMicrosoft SharePoint Elevation of Privilege Vulnerability
    35Monitor
  • CVE-2026-47298483 days apartMicrosoft SharePoint Server Remote Code Execution Vulnerability
    32Monitor
  • CVE-2025-2134828 days apartMicrosoft SharePoint Server Remote Code Execution Vulnerability
    29Monitor

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-285 · Improper Authorization

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records