CVE-2025-53771
MediumExploitedPublic exploitMicrosoft SharePoint Server Spoofing Vulnerability
Published Jul 8, 2025 · Updated Feb 13, 2026
Key Facts
Patch immediately- CVE-2025-53771 is a medium-severity vulnerability (CVSS 6.5 v3.1) affecting Sharepoint Server (Microsoft), Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019 and 1 more product.
- It is exploited in the wild, listed in Industry KEV feed since Jul 18, 2025 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 100% probability of exploitation in the next 30 days.
- Fixed versions are available, including Microsoft SharePoint Enterprise Server 2016 16.0.5513.1001, Sharepoint Server 16.0.18526.20508, Microsoft SharePoint Server 2019 16.0.10417.20037.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
100%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-53771 brief as a PDF
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Description
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jul 18, 2025 | n/a | Known |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
6 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Sharepoint ServerMicrosoft | 2016, 2019 | 16.0.18526.20508 |
| Microsoft SharePoint Enterprise Server 2016 | >= 16.0.0 | 16.0.5513.1001 |
| Microsoft SharePoint Server 2019 | >= 16.0.0 | 16.0.10417.20037 |
| Microsoft SharePoint Server Subscription Edition | >= 16.0.0 | 16.0.18526.20508 |
Patched Releases
Microsoft SharePoint Enterprise Server 2016
16.0.5513.1001
Sharepoint Server
16.0.18526.20508
Microsoft SharePoint Server 2019
16.0.10417.20037
Microsoft SharePoint Server Subscription Edition
16.0.18526.20508
Timeline
Publicly disclosed
Jul 8, 2025
Added to Industry KEV feed
Jul 18, 2025
Last updated
Feb 13, 2026
Weakness Type
- CWE-287 Improper Authentication
References
- advisoryMicrosoft SharePoint Server Spoofing Vulnerability
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitMSF sharepoint_toolpane_rce.rb
FAQ
Common Questions.
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Affected: Sharepoint Server (Microsoft) versions 2016, 2019; Microsoft SharePoint Enterprise Server 2016 versions >= 16.0.0; Microsoft SharePoint Server 2019 versions >= 16.0.0, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Jul 18, 2025 and is known to be used in ransomware campaigns.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Microsoft SharePoint Enterprise Server 2016 16.0.5513.1001, Sharepoint Server 16.0.18526.20508, Microsoft SharePoint Server 2019 16.0.10417.20037.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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