How severe is CVE-2025-30406?

CVE-2025-30406 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-30406 being actively exploited?

Yes. CVE-2025-30406 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-04-08, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-30406?

CVE-2025-30406 affects Gladinet Centrestack. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-30406?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2025-30406 have an EU (EUVD) identifier?

Yes. CVE-2025-30406 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9671. It is also flagged as exploited in the EUVD (since 2025-04-08).

When was CVE-2025-30406 published?

CVE-2025-30406 was published on 2025-04-03 and last updated on 2026-06-17.

CVE-2025-30406

CVE-2025-30406 is a critical-severity vulnerability in Gladinet Centrestack with a CVSS 3.x base score of 9.0. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-04-08). The underlying weakness is classified as CWE-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 94% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-04-08)
EU (EUVD) id: EUVD-2025-9671
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-04-08)
Weakness: CWE-798
Affected product: Gladinet Centrestack
Published: 2025-04-03
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-30406?: 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.
How severe is CVE-2025-30406?: CVE-2025-30406 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-30406 being actively exploited?: Yes. CVE-2025-30406 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-04-08, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-30406?: CVE-2025-30406 affects Gladinet Centrestack. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-30406?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2025-30406 have an EU (EUVD) identifier?: Yes. CVE-2025-30406 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9671. It is also flagged as exploited in the EUVD (since 2025-04-08).
When was CVE-2025-30406 published?: CVE-2025-30406 was published on 2025-04-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gladinet:centrestack:*:*:*:*:*:*:*:*

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