# CVE-2025-54309:  CrushFTP Unprotected Alternate Channel Vulnerability

> CVE-2025-54309: CrushFTP Unprotected Alternate Channel Vulnerability. CVSS 9.0 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2025-54309
Last updated: 2026-06-17T09:39:49Z

- Published: 2025-07-18 00:00 UTC · Updated: 2026-06-17 09:39 UTC · Assigner: mitre
- CVSS: 9.0 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS: 93.5%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-07-22, federal due date 2025-08-12, ransomware use: Unknown
- CWE: CWE-420

## 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.

## CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- CrushFTP: CrushFTP

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-54309)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-54309)
- [https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-access-on-servers/](https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-access-on-servers/)
- [https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025](https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025)
- [https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/](https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/)
- [https://www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp-vulnerability](https://www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp-vulnerability)
- [https://www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushftp-vulnerability](https://www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushftp-vulnerability)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-54309 · Markdown: https://rewindex.com/cve/CVE-2025-54309.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-54309 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:23.174Z