CVE-2025-21393

Name: CVE-2025-21393
Creator: NVD / NIST
Published: 2025-01-14T18:16:03.863+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.3/10EPSS 1.04%

Last modified Jun 17, 2026

CVE-2025-21393 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. Microsoft SharePoint Server Spoofing Vulnerability. EPSS estimates a 1.04% chance of exploitation in the next 30 days.

Description

Microsoft SharePoint Server Spoofing Vulnerability

Metrics

CVSS 3.1

6.3/10

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

EPSS Probability

1.04%

59.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Microsoft	Sharepoint Server	< 16.0.17928.20356
Microsoft	Sharepoint Server	2016
Microsoft	Sharepoint Server	2019

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21393Patch, Vendor Advisory

Timeline

Published: Jan 14, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-21393?

Microsoft SharePoint Server Spoofing Vulnerability

How severe is CVE-2025-21393?

CVE-2025-21393 has a CVSS score of 6.3/10 (MEDIUM severity). The EPSS model estimates a 1.04% probability of exploitation in the next 30 days.

How do I fix CVE-2025-21393?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-21393?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST