CVE-2025-47166: microsoft microsoft sharepoint enterprise server 2016 Deserialization of Untrusted Data
CVSS: 8.8v3.1HighAnalyzed
Published 10-06-2025Last modified 26-02-2026
Vulnerability summary
CVE-2025-47166 is a high (CVSS 8.8) Deserialization of Untrusted Data vulnerability in microsoft microsoft sharepoint enterprise server 2016. EPSS estimates a 21.64% chance of exploitation in the next 30 days, higher than 97.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
8.8/10
010
High · v3.1 (CVE.org)EPSS score
21.64%
0%100%
High · +0.48 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1exploit-database
Timeline
- 10-06-2025PublishedVulnerability first disclosed.
- 26-02-2026Last modifiedVulnerability information updated.
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
21.64%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
+0.48 pp
From 21.16% on 20-09-2026
20-09-202620-10-2026
EPSS score21.64%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundMicrosoft SharePoint 2019 - NTLM Authentication
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Microsoft5 products
- microsoft sharepoint enterprise server 2016≥ 16.0.0, < 16.0.5504.1001
- microsoft sharepoint server 2019≥ 16.0.0, < 16.0.10417.20018
- microsoft sharepoint server subscription edition≥ 16.0.0, < 16.0.18526.20396
- sharepoint_enterprise_server2016
- sharepoint_server< 16.0.18526.20396 | 2019
1 vendor · 5 products
