How severe is CVE-2025-54309?

CVE-2025-54309 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-2025-54309 being actively exploited?

Yes. CVE-2025-54309 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-07-22, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-54309?

CVE-2025-54309 affects Crushftp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-54309?

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-2025-54309 have an EU (EUVD) identifier?

Yes. CVE-2025-54309 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21909. It is also flagged as exploited in the EUVD (since 2025-07-22).

When was CVE-2025-54309 published?

CVE-2025-54309 was published on 2025-07-18 and last updated on 2026-06-17.

CVE-2025-54309

CVE-2025-54309 is a critical-severity vulnerability in Crushftp 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 2025-07-22). The underlying weakness is classified as CWE-420.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 92% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-07-22)
EU (EUVD) id: EUVD-2025-21909
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-07-22)
Weakness: CWE-420
Affected product: Crushftp
Published: 2025-07-18
Last modified: 2026-06-17

Description

CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23, when the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS, as exploited in the wild in July 2025.

Frequently asked questions

What is CVE-2025-54309?: CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23, when the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS, as exploited in the wild in July 2025.
How severe is CVE-2025-54309?: CVE-2025-54309 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-2025-54309 being actively exploited?: Yes. CVE-2025-54309 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-07-22, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-54309?: CVE-2025-54309 affects Crushftp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-54309?: 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-2025-54309 have an EU (EUVD) identifier?: Yes. CVE-2025-54309 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21909. It is also flagged as exploited in the EUVD (since 2025-07-22).
When was CVE-2025-54309 published?: CVE-2025-54309 was published on 2025-07-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:crushftp:crushftp:*:*:*:*:*:*:*:*

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