What is the CVSS score of EUVD-2025-20552?

EUVD-2025-20552 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 59.9%.

Is there a public PoC exploit available for EUVD-2025-20552?

Yes, a public proof-of-concept exploit is available for EUVD-2025-20552. Prioritise patching immediately. EPSS: 59.9%.

How to fix or mitigate EUVD-2025-20552?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Audit authentication configurations.

Sharepoint Enterprise Server EUVD-2025-20552

Q: Which versions of Sharepoint Enterprise Server are affected by EUVD-2025-20552?

Organizations using Improper authentication in Microsoft Office SharePoint should be aware of notable risk from CVE-2025-49706, a improper authentication vulnerability rated CVSS 6.5.. A patch is available.

| CVE-2025-49706 MEDIUM

Improper Authentication (CWE-287)

2025-07-08 secure@microsoft.com

Authentication Bypass Microsoft Sharepoint Enterprise Server Sharepoint Server

6.5

CVSS 3.1 · Vendor: microsoft

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Vulnerability Assessment

Weakness	CWE CWE-287 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Authentication mechanism validation MITRE ATT&CK 2 techniques across 2 tactics: Defense Evasion, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	Unauthorized access to protected functionality, data, or administrative interfaces, potentially leading to full system compromise. With a CVSS score of 6.5 (MEDIUM), this represents a moderate risk.
Exploit ScenarioDerived	An attacker manipulates authentication tokens, exploits logic flaws, or uses default credentials to bypass the login mechanism and access restricted areas.

Act Now Prioritize within 24-48h. Why: In CISA KEV with patch available.

Exploited in the wild (CISA KEV) Patch available 59.9% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 16, 2026

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

Earlier versions of this analysis (1)

v1 Mar 16, 2026 - 04:21 CVSS 6.5

RemediationAI

Implement robust authentication mechanisms. Use multi-factor authentication. Review authentication logic for bypass conditions. Remove default credentials.

Affected VersionsENISA

Microsoft SharePoint Server 2019 16.0.0 <16.0.10417.20027

Microsoft SharePoint Server Subscription Edition 16.0.0 <16.0.18526.20424

Microsoft SharePoint Enterprise Server 2016 16.0.0 <16.0.5508.1000

Affected Packages

euvd microsoft_sharepoint_enterprise_server_2016 fix: 16.0.5508.1000

euvd microsoft_sharepoint_server_2019 fix: 16.0.10417.20027

euvd microsoft_sharepoint_server_subscription_edition fix: 16.0.18526.20424

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 3 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

An authentication bypass vulnerability allows attackers to circumvent login mechanisms and gain unauthorized access without valid credentials. This vulnerability is classified as Improper Authentication (CWE-287).

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (microsoft) PRIMARY 6.5 MEDIUM

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

Primary rating from Vendor (microsoft) · only source for this CVE.

CVSS VectorVendor: microsoft

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

16.0.10417.20027,16.0.18526.20424,16.0.5508.1000

Added to CISA KEV

Oct 27, 2025 - 17:12 cisa

CISA KEV

CVE Published

Jul 08, 2025 - 17:15 nvd

MEDIUM 6.5

Executive ViewAI

Why It Matters

Organizations using Improper authentication in Microsoft Office SharePoint should be aware of notable risk from CVE-2025-49706, a improper authentication vulnerability rated CVSS 6.5. This could allow unauthorized access to protected resources. This vulnerability is actively exploited in the wild (KEV-listed). Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: High

Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access, enable MFA, monitor auth logs.

Threat Intelligence Overview

Threat Score

8.1/10

Composite threat intelligence

EPSS Score

59.9%

Top 2% exploitable

Threat Intel

1 sources

Exploit

POC

Public exploit code exists

Data Quality

7 sources

Confidence: High

EUVD

NVD

CVE.org

CISA KEV

EPSS CERT-EU POC (2) THREAT

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV Yes

Public POC Yes

EPSS 59.9%

Patch available Yes

Active threat Yes

Deciding rule

In CISA KEV with patch available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Immediate

Exploitation· derived

Active

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

High

Priority Score

187

Low Medium High Critical

KEV: +50

EPSS: +60

CVSS: +32

PoC: +20

Weaponized: +15

Threat intel: +10

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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Threat IntelligenceMISP

ATT&CK Techniques (observed)

T1190 - Exploit Public-Facing Application

CERT-EU Advisories

CERT-EU-2025-027

Sources: MITRE ATT&CK, CERT-EU, Metasploit/Nuclei

References

Advisories & patches

ADVISORY https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49706 ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-49706 ADVISORY https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities ADVISORY https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/ REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-49706

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GitHub PoC

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