Microsoft SharePoint Server Improper Input Validation Vulnerability

Technical Severity

CVSS v3.1 Metrics

MEDIUM

6.5 / 10

Minimal Risk Critical

Vector Specification

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

Exploitation Likelihood

EPSS Prediction

2.05 %

Predictive Probability

Percentile Rank

83.9 th

Documented as more likely to be exploited than 83.9% of known CVEs.

Detection Date

Apr 14, 2026

Remediation Due

Apr 28, 2026

CISA Catalog Active

Threat Analysis

Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network.

Remediation Directive

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

External Intelligence

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-32201

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2026-32201