NVD / CVE Program· CNA microsoft

CVE-2025-53771: Microsoft SharePoint Server Spoofing Vulnerability

Noroxi assessment

Priority: This week (action score 60/100)

A ready-made attack module is public (Metasploit, Nuclei); exploiting it takes no special expertise.
A ready-made attack tool exists and the flaw can be exploited over the network without an account, so priority is at least “This week”.
Probability of exploitation in the next 30 days: 99.8% (FIRST EPSS); higher than 99.9% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: Microsoft SharePoint Enterprise Server 2016 16.0.5513.1001; Microsoft SharePoint Server 2019 16.0.10417.20037; Microsoft SharePoint Server Subscription Edition 16.0.18526.20508.

Don’t wait for the next maintenance window. Upgrade to Microsoft SharePoint Enterprise Server 2016 16.0.5513.1001; Microsoft SharePoint Server 2019 16.0.10417.20037; Microsoft SharePoint Server Subscription Edition 16.0.18526.20508 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

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

MediumCVSS 6.5 · v3.1—Weaponized Fix available

BDU:2025-08787

Published: Jul 20, 2025
Updated: Jun 17, 2026
EPSS: 99.8% · 99th percentile
CWE: CWE-287

Report tools

JSON

Action score

This week

Don’t wait for the next maintenance window.

CVSS: 26 / 40 · 6.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 30 / 30 · 99.8%
Ready-made attack tool: 4 / 60 · floor: at least 60

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · microsoft: 6.5; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/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
Weaponized exploit exists
A fix has been released

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

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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.

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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.

Vendor	Product	CPE
microsoft	sharepoint server	cpe:2.3:a:microsoft:sharepoint_server

Affected versions

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

microsoft sharepoint serverbefore 16.0.18526.20508
microsoft sharepoint server2016
microsoft sharepoint server2019

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 16.0.5513.1001affected
Microsoft Microsoft SharePoint Server 2019
- 16.0.0 and later · before 16.0.10417.20037affected
Microsoft Microsoft SharePoint Server Subscription Edition
- 16.0.0 and later · before 16.0.18526.20508affected

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-2025-30384May 13, 2025 · Microsoft SharePoint Server Remote Code Execution Vulnerability
28Monitor
← EarlierCVE-2025-49701Jul 8, 2025 · Microsoft SharePoint Remote Code Execution Vulnerability
35Monitor
Later →CVE-2025-49712Aug 12, 2025 · Microsoft SharePoint Remote Code Execution Vulnerability
41Plan

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
Microsoft SharePoint Enterprise Server 2016	16.0.5513.1001 · KB5002760	Microsoft (MSRC)
Microsoft SharePoint Server 2019	16.0.10417.20037 · KB5002754	Microsoft (MSRC)
Microsoft SharePoint Server Subscription Edition	16.0.18526.20508 · KB5002768	Microsoft (MSRC)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Metasploit module ×1
Nuclei detection template ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Metasploit module	exploit/windows/http/sharepoint_toolpane_rceMicrosoft SharePoint Server ToolPane Unauthenticated Remote Code Execution (aka ToolShell)exploit	2025-07-08
Nuclei detection template	Nuclei template CVE-2025-53770	—
Nuclei detection template	Nuclei template CVE-2025-53771	—

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.

MetasploitJul 8, 2025-13 d
PublishedJul 20, 2025
TodayOct 27, 2026+464 d

EPSS, last 120 days

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

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

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

CVE-2026-62827387 days apartMicrosoft SharePoint Server Elevation of Privilege Vulnerability
35Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2025-4970412 days apartMicrosoft SharePoint Remote Code Execution VulnerabilityKEV
95Now
CVE-2025-4971223 days apartMicrosoft SharePoint Remote Code Execution Vulnerability
41Plan
CVE-2025-4970112 days apartMicrosoft SharePoint Remote Code Execution Vulnerability
35Monitor
CVE-2025-5376023 days apartMicrosoft SharePoint Elevation of Privilege Vulnerability
34Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: low · data can be read
Integrity: low · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: Low
Integrity impact: Low
Availability impact: None

Weakness class (CWE)

CWE-287 · Improper Authentication

CVSS vector

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

nvd-secondary

Root cause

Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

The bug in code

The whole CWE-287 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1app.use("/admin", requireSession, adminRouter);
2

3// Route added later skips the middleware
4app.post("/admin-api/config", updateConfig);

Fixed

1const admin = express.Router();
2admin.use(requireSession, requireRole("admin"));
3

4admin.post("/config", updateConfig);
5app.use("/admin", admin);