Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2025-30406

CentreStack Deserialization

Gladinet / CentreStack · affected before 16.4.10315.56368

Watch CVE-2025-30406 Browse KEV feed
Severity
CVSS 9.0 · Critical
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
94.3%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2025-30406 is an unauthenticated vulnerability affecting Gladinet CentreStack. Gladinet CentreStack through 16.1.10296.56315 (fixed in 16.4.10315.56368) has a deserialization vulnerability due to the CentreStack...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Gladinet / CentreStack affected before 16.4.10315.56368.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

CentreStack Deserialization

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.

Gladinet Affected
CentreStack
Before 16.4.10315.56368
Published
03 Apr 2025
Exploitation Reported
08 Apr 2025
Attack vector
Remote
Complexity
High
Privileges
None
User interaction
None

Tags

metasploit cisa nuclei_scanner

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 08 Apr 2025

A trusted third party reported exploitation.

Proof of concept available

GitHub

Recorded 24 Apr 2025

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CISA First 2025-04-08 00:00 UTC
The Shadowserver 2026-07-08 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Metasploit https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/gladinet_viewstate_deserialization_cve_2025_30406.rb 09 Jun 2025
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-30406.yaml 25 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.0 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

94.3%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Use of Hard-coded Cryptographic Key CWE-321 Use of Hard-coded Credentials CWE-798

Recent mention · Huntress Blog

Huntress Tragic Quadrant: Top Cyber Threats Wrecking Businesses

The Huntress Tragic Quadrant ranks the cyber threats hitting businesses most, from RMM abuse to AiTM, ClickFix, using real SOC data.

Read full advisory

All Mentions

Recent mention · Huntress Blog

Huntress Tragic Quadrant: Top Cyber Threats Wrecking Businesses

Huntress Blog · 01 Oct 2026

The Huntress Tragic Quadrant ranks the cyber threats hitting businesses most, from RMM abuse to AiTM, ClickFix, using real SOC data.

Recent mention · Huntress Blog

Google Doc Sidebar Sends Mac and Windows Users Down Different Paths to Malware

Huntress Blog · 15 Sep 2026

A single X DM split into two malware chains: AMOS stealer on Mac, NetSupport Manager on Windows, see the Huntress SOC analyst breakdown.

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Gladinet CentreStack < 16.4.10315.56368 Use of Hard-coded Key Leads to Unauthenticated RCE

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 00:00 UTC

    KEV confirmed by The Shadowserver

    Exploitation attested by an external source

  2. 14:20 UTC

    Public PoC available

    Public proof-of-concept code published

  3. 13:36 UTC

    Metasploit module available

    Exploit module available

  4. 00:00 UTC

    Nuclei template available

    Scanner coverage available

  5. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  6. 00:00 UTC

    CVE published

    Vulnerability disclosed publicly

  7. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2025-30406

Sample API response 
{
  "cve_id": "CVE-2025-30406",
  "confidence": "Confirmed",
  "cvss_score": 9.0,
  "cvss_estimated": false,
  "epss_score": 0.94343,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}