CVE-2025-21400: microsoft microsoft sharepoint enterprise server 2016 Improper Authorization
CVSS: 8.0v3.1HighAnalyzed
Published 11-02-2025Last modified 13-02-2026
Vulnerability summary
CVE-2025-21400 is a high (CVSS 8.0) Improper Authorization vulnerability in microsoft microsoft sharepoint enterprise server 2016. EPSS estimates a 34.49% chance of exploitation in the next 30 days, higher than 98.4% of scored vulnerabilities.
CVSS score
8.0/10
010
High · v3.1 (CVE.org)EPSS score
34.49%
0%100%
High · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 11-02-2025PublishedVulnerability first disclosed.
- 13-02-2026Last modifiedVulnerability information updated.
Description
Microsoft SharePoint Server Remote Code Execution Vulnerability
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.0Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST8.0HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
34.49%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
0.00 pp
From 34.49% on 20-09-2026
20-09-202620-10-2026
EPSS score34.49%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft4 products
- microsoft sharepoint enterprise server 2016≥ 16.0.0, < 16.0.5487.1000
- microsoft sharepoint server 2019≥ 16.0.0, < 16.0.10416.20050
- microsoft sharepoint server subscription edition≥ 16.0.0, < 16.0.17928.20396
- sharepoint_server< 16.0.17928.20396 | 2016 | 2019
1 vendor · 4 products
