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Exploited vulnerability · CISA KEV

Is CVE-2025-54309 exploited? Yes: in CISA KEV since 22 Jul 2025

Gociux · CrushFTP · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2025-54309, CrushFTP Unprotected Alternate Channel Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 22 Jul 2025, 4 days after it was published. It affects CrushFTP. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 22 Jul 2025
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9CVSS 3.1 · critical
US federal due12 Aug 2025BOD 22-01 deadline

What it is

CrushFTP contains an unprotected alternate channel vulnerability. When the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS.

VendorCrushFTP (3 exploited CVEs in KEV)
ProductCrushFTP
Vulnerability CrushFTP Unprotected Alternate Channel Vulnerability
WeaknessCWE-420
Published18 Jul 2025
Added to KEV22 Jul 2025
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for CrushFTP in your asset inventory, including appliances and cloud images. Stack check lists every exploited CrushFTP CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 18 Jul 2025.
  4. Get told next time. Email alerts when CISA adds a CVE for CrushFTP.

Other exploited CVEs in CrushFTP

References

Questions

Is CVE-2025-54309 being exploited?

Yes. CISA added CVE-2025-54309 to the Known Exploited Vulnerabilities catalog on 22 Jul 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2025-54309 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2025-54309?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check CrushFTP's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected CrushFTP and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in July 2025 · CrushFTP scorecard · act-now radar.

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