CVE-2025-54309

Name: CVE-2025-54309
Creator: NVD / NIST
Published: 2025-07-18T19:15:25.353+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 92.03%

Last modified Jun 17, 2026

CVE-2025-54309 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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 has confirmed active exploitation in the wild. EPSS estimates a 92.03% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

92.03%

99.8th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Aug 12, 2025.

Weakness Enumeration

CWE-420

Affected Software

Vendor	Product	Versions
Crushftp	Crushftp	>= 10.0.0, < 10.8.5
Crushftp	Crushftp	>= 11.0.0, < 11.3.4_23

References

https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-access-on-servers/Press/Media Coverage
https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025Vendor Advisory
https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/Press/Media Coverage
https://www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp-vulnerabilityThird Party Advisory
https://www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushftp-vulnerabilityThird Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-54309US Government Resource

Timeline

Published: Jul 18, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-54309?

How severe is CVE-2025-54309?

CVE-2025-54309 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 92.03% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2025-54309?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-54309?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST