What is the CVSS score of CVE-2025-30406?

CVE-2025-30406 has a CVSS 3.1 base score of 9.0 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 83.4%.

Is there a public PoC exploit available for CVE-2025-30406?

Yes, a public proof-of-concept exploit is available for CVE-2025-30406. Prioritise patching immediately. EPSS: 83.4%.

How to fix or mitigate CVE-2025-30406?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Vendor patch is available.

Centrestack CVE-2025-30406

CRITICAL

Use of Hard-coded Cryptographic Key (CWE-321)

2025-04-03 cve@mitre.org

RCE Deserialization Centrestack Gladinet

9.0

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-321 OWASP Top 10:2025 A04:2025 - Cryptographic Failures ASVS 5.0 V11 - Cryptography Key management, no hard-coded keys
Impact	Critical risk (CVSS 9.0, EPSS 83.4%). A shared hardcoded key across all installations means one exploit works against every CentreStack deployment worldwide.
Exploit ScenarioDerived	An attacker uses the publicly known machineKey to create a serialized .NET payload, signs it as valid ViewState, and sends it to any CentreStack portal. The server deserializes the trusted payload, executing the attacker's code.

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

Exploited in the wild (CISA KEV) Patch available 83.4% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 28, 2026

Gladinet CentreStack contains a deserialization vulnerability caused by a hardcoded machineKey in the portal, allowing unauthenticated remote code execution through crafted ViewState payloads.

Earlier versions of this analysis (1)

v1 Mar 28, 2026 - 18:34 CVSS 9.0

A hardcoded machineKey in Gladinet CentreStack enables unauthenticated attackers to craft serialized ViewState payloads for remote code execution. Exploited in the wild in March 2025.

RemediationAI

Update to 16.4.10315.56368+. Generate unique machineKeys for each installation. Review for signs of exploitation.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

The CWE-321 use of a hardcoded cryptographic key means all CentreStack installations share the same machineKey for ViewState MAC validation. Attackers craft malicious .NET serialized objects, sign them with the known key, and submit them for server-side deserialization.

Know when Centrestack gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 9.0 CRITICAL

AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 28, 2026 - 18:34 nvd

Patch available

Added to CISA KEV

Nov 05, 2025 - 19:27 cisa

CISA KEV

CVE Published

Apr 03, 2025 - 20:15 nvd

CRITICAL 9.0

DescriptionCVE.org

Gladinet CentreStack through 16.1.10296.56315 (fixed in 16.4.10315.56368) has a deserialization vulnerability due to the CentreStack portal's hardcoded machineKey use, as exploited in the wild in March 2025. This enables threat actors (who know the machineKey) to serialize a payload for server-side deserialization to achieve remote code execution. NOTE: a CentreStack admin can manually delete the machineKey defined in portal\web.config.

Executive ViewAI

Why It Matters

CVE-2025-30406 presents critical security risk, a hard-coded crypto key vulnerability rated CVSS 9.0. Successful exploitation could allow attackers to execute arbitrary code or commands on affected systems, potentially leading to full system compromise. This vulnerability is actively exploited in the wild (KEV-listed) and requires immediate remediation. A patch is available and should be applied immediately given the critical severity.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

Threat Score

7.3/10

Composite threat intelligence

EPSS Score

83.4%

Top 1% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

CISA KEV

EPSS POC (2)

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 CRITICAL

CISA KEV Yes

Public POC Yes

EPSS 83.4%

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

Human Impact

Very High

Priority Score

213

Low Medium High Critical

KEV: +50

EPSS: +83

CVSS: +45

PoC: +20

Weaponized: +15

Threat intel: 0

Gov advisory: 0

Attack Technique

Insecure Deserialization CRITICAL

Insecure deserialization occurs when an application converts serialized data (a stream of bytes representing an object's state) back into a living object without proper validation.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.