6.5

CVE-2025-53771: microsoft microsoft sharepoint enterprise server 2016 Improper Authentication

CVSS: 6.5v3.1MediumAnalyzed
Published 20-07-2025Last modified 13-02-2026
Open JSON

Vulnerability summary

CVE-2025-53771 is a medium (CVSS 6.5) Improper Authentication vulnerability in microsoft microsoft sharepoint enterprise server 2016. EPSS estimates a 99.89% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
56/100
0100
High · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
99.89%
0%100%
Critical · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1metasploit

Timeline

  1. 20-07-2025
    PublishedVulnerability first disclosed.
  2. 13-02-2026
    Last modifiedVulnerability information updated.

Description

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

99.89%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

+0.08 pp

From 99.81% on 21-09-2026

21-09-202621-10-2026
EPSS score
99.89%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • MetasploitMetasploitremoteVerified

    Microsoft SharePoint Server ToolPane Unauthenticated Remote Code Execution (aka ToolShell)

    exploit/windows/http/sharepoint_toolpane_rce

    Maturity: weaponized

Weaknesses

CWE · root cause

Affected systems

Microsoft4 products

1 vendor · 4 products

References

2 links